So like Windows then? Cause a free alternative exists?
Or farmers markets? Cause you can just grow all those crops for free yourself.
Or carpenters? Just get some tools, do your home renovations for free.
Or sex workers? Cause you can just go to a bar and get it for free.
Oh, they are differences between the free and the pay options? The occupy different niches in the marketplace? You don't say. Maybe they are not scams after all, just cater to different tastes.
(I also prefer lichess over chess.com but that doesn't mean I think this is a reasonable argument.)