There are several ways to reinvest crypto to earn more crypto. Here are some examples:
Breeding: cryptokitties, fishbank, etc.
Resale: openbazaar, landhodler, etc.
Gambling: bitstars, mbit, betcoin and others.
Has anyone had experience with these sites? Are there other examples of reinvestment?
I think you can do this in every exchange, especially if you just received it from the campaign or bounty you can reinvest it on your own without needing any third party to do that to you. Its good to revinvest the profit you get here so you can have more profit in the future, dont get tired of investing keep on doing that and be patient.