I assume you're talking about ads. But you're bidding at least cents on Adwords and making at least cents on Adsense. In Adsense's hey day, I had relatively low-volume sites making over $1 per click and paying my rent in lucrative niches.

I didn't find any pricing examples on hcaptcha's website. For all I know, people are bidding 5 cents per image.

Anyways, I definitely want to see more serious contenders in the captcha space so that we all aren't contributing to Google's middle-manning of the entire internet, and I'd like to try hcaptcha even out of curiosity.