Earlier quoted context omitted.
I've been thinking about this a lot lately. Where is our compensation? It's our time and brain power training Google's AI that will one day be sold back to us. I'm really not into this.
Because Google can extract value from captchas, it makes world-class captchas and bot detection AI available to every webmaster for free. I don't know what that level of service would otherwise cost, but it almost certainly wouldn't be affordable for low-traffic blogs and the like, which would end up vulnerable using weaker captchas or trying to roll their own. Everywhere else the cost would just get passed on to use…
Very few low-traffic blogs that I see use (or need) CAPTCHAs. I know that the ones I run don't.
> I don't love the compromise of paying for things with my data or by training Google's AI, but it's hard to say users aren't getting anything out of it.
I don't think they are getting much, if anything out of it -- aside from being increasingly punished for defending themselves against being spied on by Google.