Farcaster

Back in 2010 there was this website called The Bitcoin Faucet that gave away 5 BTC to anyone who visited and completed a simple CAPTCHA. Yes it was that simple. Imagine how many lives could be different today because of simply solving a CAPTCHA years ago.
The whole point of the faucet was to spread awareness and get people interested in Bitcoin - Keep in mind that it was worth just a few cents back then.

I did a 2min research and learned that it was created by a developer named Gavin Andresen. Gavin Andresen was one of the most important developers of Bitcoin and was heavily involved in the project after Satoshi went MIA.

I think even if I had won the BTC back then I probably wouldve sold almost immediately if I knew how to do it at the time.