this question doesn't really make sense as osu isn't p2w game. How much have you actually had to spent to play osu? Humans needed to evolve for hundreds of thousands of years, technology, infrastructure and healthcare needed to be developed. If we are speaking from monetary standpoint, its hard to approximate but it definitely took more money than i can count to (think quadrillions). But of course in this time humanity developed other things than osu and tens of billions of people have existed total in this time frame so it would have to be split. After i did some very rough calculations, every human on earth ever has to have contributed/spent about 67.3$ for osu to happen.