[georgelyon]

This reply hits the nail on the head, but I’ll just add that this isn’t only a benefit to small scale services. I’ve been at well funded startups and medium sized companies where we spent quite a bit of time and effort dealing with spam and bot activity, to the point of making trade offs in the product to lower the impact of bad actors. Even companies that are more or less successful at this spend a TON of money and engineering resources on this problem, and it still manages to detract from the UX (think Twitter bots). I wouldn’t be surprised if the economic benefit of a technical solution to this problem was on the order of tens of billions of $$.