This is a list of when the users that I recognize as an OT member (that posted somewhat lately), except for ppy, have their account created. The order of the list is from oldest to newest.
Ancient (10+ years)
peppy - August 28th, 2007 - 13 years 11 months
silmarilen - February 15th, 2010 - 11 years 6 months
levesterz - September 21st, 2010 - 10 years 10 months
Arctos Sagittario - August, 11th, 2011 - 10 years
Very old (6+ years)
- Marco - - December 19th, 2011 - 9 years 7 months
ColdTooth - June 7th, 2012 - 9 years 2 months
DragonSlayer96 - July 17th, 2012 - 9 years 1 month
eblf2013 - March 4th, 2013 - 8 years 5 months
kai99 - July 15th, 2013 - 8 years 1 month
Penguin - August 24th, 2013 - 7 years 11 months
clayton - November 29th, 2013 - 7 years 8 months
KatouMegumi - May 23rd, 2014 - 7 years 2 months
abraker - July 10th, 2014 - 7 years 1 month
GSG95 - October 30th, 2014 - 6 years 9 months
Serraionga - November 9th, 2014 - 6 years 9 months
Meah - November 16th, 2014 - 6 years 9 months
marijuana - May 15th, 2015 - 6 years 3 months
Fhaye - May 23rd, 2015 - 6 years 2 months
Tsumugi Aoba - July 4th, 2015 - 6 years 1 month
Tad Fibonacci - August 1st, 2015 - 6 years
Old (4+ years)
igorsprite - September 6th, 2015 - 5 years 11 months
Taj - December 18th, 2015 - 5 years 7 months
Ashton - February 4th, 2016 - 5 years 6 months
[ - Zekks - ] - March 18th, 2016 - 5 years 4 months
roshan117 - April 16th, 2016 - 5 years 4 months
Winnyace - June 20th, 2016 - 5 years 1 month
Zelzatter Zero - October 30th, 2016 - 4 years 9 months
Achromalia - November 16th, 2016 - 4 years 9 months
JustABeginner - December 8th, 2016 - 4 years 8 months
ghoulybits - January 20th, 2017 - 4 years 6 months
Meguro - June 26th, 2017 - 4 years
Less Old (2+ years)
Sombez - September 25th, 2017 - 3 years 10 months
keremaru - November 6th, 2017 - 3 years 9 months
samX500 - January 6th, 2018 - 3 years 7 months
z0z - March 1st, 2018 - 3 years 5 months
ClevelandsMyBro - April 24th, 2018 - 3 years 3 months
pentaqola - June 1st, 2018 - 3 years 2 month
[LS]PositoniX - June 10th, 2018 - 3 years 2 months
Phantonym - May 12th, 2019 - 2 years 3 month
Synphonica - July 6th, 2019 - 2 years 1 month
WitherMite - August 8th, 2019 - 2 years
Less Recent (1+ years)
Cerno - November 13th, 2019 - 1 year 9 months
Corne2Plum3 - November 29th, 2019 - 1 year 7 months
Reforms Expert - January 2nd, 2020 - 1 year 7 months
Asphiee - January 14th, 2020 - 1 year 7 months
Wowcake - February 4th, 2020 - 1 year 6 months
Hydreigon - February 25th, 2020 - 1 year 5 months
_ralsei - February 29th, 2020 - 1 year 5 months
Farfocele - April 7th, 2020 - 1 year 4 months
Akumace1 - April 7th, 2020 - 1 year 4 months
YyottaCat - July 17th, 2020 - 1 year 1 month
NotRaffi - July 23rd, 2020 - 1 year
Sugar_owo - August 6th, 2020 - 1 year
Recent (6+ months)
Yhuan Debeste - September 29th, 2020 - 10 months
bambinex - October 9th, 2020 - 10 months
AndPeggy123 - October 30th, 2020 - 9 months
Itz_UwU_Playz - November 12th, 2020 - 9 months
ShinRun - November 17th, 2020 - 9 months
Asian Warlord - November 18th, 2020 - 8 months
New (6- months)
Updating later...
Maybe I should clear out the inactives...
peppy - August 28th, 2007 - 13 years 11 months
silmarilen - February 15th, 2010 - 11 years 6 months
levesterz - September 21st, 2010 - 10 years 10 months
Arctos Sagittario - August, 11th, 2011 - 10 years
- Marco - - December 19th, 2011 - 9 years 7 months
ColdTooth - June 7th, 2012 - 9 years 2 months
DragonSlayer96 - July 17th, 2012 - 9 years 1 month
eblf2013 - March 4th, 2013 - 8 years 5 months
kai99 - July 15th, 2013 - 8 years 1 month
Penguin - August 24th, 2013 - 7 years 11 months
clayton - November 29th, 2013 - 7 years 8 months
KatouMegumi - May 23rd, 2014 - 7 years 2 months
abraker - July 10th, 2014 - 7 years 1 month
GSG95 - October 30th, 2014 - 6 years 9 months
Serraionga - November 9th, 2014 - 6 years 9 months
Meah - November 16th, 2014 - 6 years 9 months
marijuana - May 15th, 2015 - 6 years 3 months
Fhaye - May 23rd, 2015 - 6 years 2 months
Tsumugi Aoba - July 4th, 2015 - 6 years 1 month
Tad Fibonacci - August 1st, 2015 - 6 years
igorsprite - September 6th, 2015 - 5 years 11 months
Taj - December 18th, 2015 - 5 years 7 months
Ashton - February 4th, 2016 - 5 years 6 months
[ - Zekks - ] - March 18th, 2016 - 5 years 4 months
roshan117 - April 16th, 2016 - 5 years 4 months
Winnyace - June 20th, 2016 - 5 years 1 month
Zelzatter Zero - October 30th, 2016 - 4 years 9 months
Achromalia - November 16th, 2016 - 4 years 9 months
JustABeginner - December 8th, 2016 - 4 years 8 months
ghoulybits - January 20th, 2017 - 4 years 6 months
Meguro - June 26th, 2017 - 4 years
Sombez - September 25th, 2017 - 3 years 10 months
keremaru - November 6th, 2017 - 3 years 9 months
samX500 - January 6th, 2018 - 3 years 7 months
z0z - March 1st, 2018 - 3 years 5 months
ClevelandsMyBro - April 24th, 2018 - 3 years 3 months
pentaqola - June 1st, 2018 - 3 years 2 month
[LS]PositoniX - June 10th, 2018 - 3 years 2 months
Phantonym - May 12th, 2019 - 2 years 3 month
Synphonica - July 6th, 2019 - 2 years 1 month
WitherMite - August 8th, 2019 - 2 years
Cerno - November 13th, 2019 - 1 year 9 months
Corne2Plum3 - November 29th, 2019 - 1 year 7 months
Reforms Expert - January 2nd, 2020 - 1 year 7 months
Asphiee - January 14th, 2020 - 1 year 7 months
Wowcake - February 4th, 2020 - 1 year 6 months
Hydreigon - February 25th, 2020 - 1 year 5 months
_ralsei - February 29th, 2020 - 1 year 5 months
Farfocele - April 7th, 2020 - 1 year 4 months
Akumace1 - April 7th, 2020 - 1 year 4 months
YyottaCat - July 17th, 2020 - 1 year 1 month
NotRaffi - July 23rd, 2020 - 1 year
Sugar_owo - August 6th, 2020 - 1 year
Yhuan Debeste - September 29th, 2020 - 10 months
bambinex - October 9th, 2020 - 10 months
AndPeggy123 - October 30th, 2020 - 9 months
Itz_UwU_Playz - November 12th, 2020 - 9 months
ShinRun - November 17th, 2020 - 9 months
Asian Warlord - November 18th, 2020 - 8 months
Maybe I should clear out the inactives...