This blog post is quite bad on all of its points.

More specifically to dating apps: There is a huge market imbalance on it, there are only a few women to pair off to whomever they prefer... So they can serve that market just fine, then the rest of the men are the ones to jerk around a bit: trick them with bots, tell them if they pay they will move up the ranks and have a better chance, come up with "studies" that show all they have to do is make better pictures and keep paying and trying.

How immoral is it really to satisfy a percentage of users... and then abuse the rest? Its not like you can properly give them what they are looking for anyway. I think its quite immoral but thats why I am not a successful businessman.

The pizza and other comparisons are quite dumb and not the same thing: A market that requires many participants to benefit a few, only some can be helped so do your best with those, then figure out how to abuse some/many for profits. If they don't figure out how it really works, well, thats a shame that they keep participating.