Do you mean that, when we are solving captchas on the RaiBlocks Faucet, we are mining RaiBlocks?
That's exactly it! It's proof of human. The more people do it, the higher the difficulty.
Thank you. Awesome. I didn't know that I have been a RaiBlocks miner for over one month. I thought the captcha-solving is just to facilitate the transactions of RaiBlocks.