While the 80/20 stuff is true i think another under-explored aspect is that there just isn't many non-bot women on these dating apps, after all their business is exploiting men for these gold memberships/boosts. Most women i know in their 20s easily get attention on a daily basis through posting on Instagram, working as a retail/waitress job or going to a bar, they also have social groups and hobbies so they aren't really using Tinder.