I think you are criticising a valid business model as if it were somehow a negative. Theres some business risk by the company to operate but they have been around a while and I see no reason to assume they are negative in serving customers. It doesnt resemble a pyramid scheme. Depositing your crypto anywhere has a risk attached to it but its a flat consideration to using every site isnt it
Interesting sites though
reCAPTCHA is a free service from Google for a site so it doesn't make any monetary saving. The only cost involved is for botnets to solve them.
Its in googles own interest to make sure people viewing sites connected to them are humans so that advertising is valid. Its heavily destructive to their business model if the page traffic is artificial and there is no consumer behind the screen viewing advertising google might supply. Or even if not direct advertising, google still wants to know the entity they are tracking is a human not a bot so thats a big incentive to them to discourage that kind of activity. Obviously FreeBitco doesnt want bots harvesting easy money either. Its only twitter or twitch I see people actively chasing and paying for bot usage to create an illusion of greater influence then they actually have