Everyone on Osu is possibly aware of that they can chart their own songs, however not everyone is at the same level of experience when it comes to mapping songs by themselves — mapping request queues from what i've seen are normally hosted for fun, so I don't see it as a bad thing (At least it's not making a new forum topic asking for a map of a song to be made).
I was actually considering opening one up for Osu!Mania 4K mapping due to my lack of motivation this year in comparison to the past 2 years, so I just wanted to get back into the swing of things that way (While of course, not wanting profit from it at all).