@Kotaix
I read through the article. One of the important things is to look at his age, general area and what his physical appearance is like. He says he is 22, so there will be many women around his age who are single and he is well within the dating age range for many. He lives in an area with approximately 1 million people and he stated that he was decent looking, so not like he's massively overweight, etc.
I'm not terribly surprised by any of this and I feel this is pretty normal. Let's say he is a 6 or 7, so decent looking but still otherwise relatively normal. A man like this isn't going to stand out because there isn't really anything unique about him, as there are also tons of other men who are normal-above average. There is nothing wrong with him, it's just that these women have tons of options that are as good or even better than he is.
I know of one individual who does well with tinder, it took me a while to figure out why this was the case but this is what I came to. He is an above average man but nothing outlandish, I'd personally rate him a 7. He is tall and attractive facially but average fit, so it looks like he is active but isn't very fit, for instance he can only do like 3 or 4 chin ups. However, this is what I feel is the reason for his success. He is mixed race, black+white+hispanic, and that is something that is very unusual in the area we live in. Combine this with the fact that he dresses, speaks and projects an image of being more like a white man it is something that just isn't that common to see. I've met several of the women he has connected with through those dating apps, I'd honestly consider them pretty average from what I've seen.