That's funny at first glance but it might be more accurate than we would like to admit. Maybe there were a lot of below average men (compared to the general population) on OKC when that study was conducted

Actually, the OkCupid founders used their own pictures and got nailed as significantly below average. <chuckle>

They really weren't. If anything, they were probably a bit above average.

Although, there is one thing that might have contributed back in the day. Female users of online dating might have been concentrated in tech areas. Being a rare female in a male dominated ratio area causes a highly skewed estimate of how attractive you really are.

It could also reflect the nature of the general population. The distribution is unlikely to be symmetric.

Discovering that men 'over average' don't have problems to find women or are married yet, so don't need the services of the platform wouldn't be much of a surprise...

This is very true. Anecdote and all that but I've known some very fortunate dudes who literally just had to show up and the ladies would fall over themselves. It was entertaining and sobering at the same time.