This is actually really great because I've talked about how I would use this technology quite a few times.

https://steemit.com/utopian-io/@edicted/captchain

We can start connecting this service with other services to make it much harder to automate bots that leech rewards. For example, you planted Wheat on your SteemFarm; complete a Captcha. You want to harvest the Wheat; complete the Captcha. Now it's much much harder to bot the in game economy and ruin it.