Bitbounce - Charge unsolicited email senders a cryptocurrency fee
PubLoft - Freelancer network for writers powered by the gig economy
Octopus Tasks - Earn by doing micro-tasks for companies and friends.
SantaHunt - Secret Santa with the Product Hunt community
SerpClix - SerpClix is a click exchange network used to send more real clicks to your Google SERP. You can click to earn money or buy clicks to rank higher on Google.
Secret Santa - Organize Secret Santa groups with your friends