Experty.io is the first Ethereum powered voice and video application which allows users to monetize their time, knowledge, and expertise on a global scale. The Ethereum blockchain allows for automatic payments from client to contractor based on the predetermined rate and the length of the conversation. Experts on any subject can share a link to their Experty profile on any platform they see fit, including but not limited to, social media, websites, and emails. There is no central marketplace.
Experty airdrops EXY token (~TBA) to their airdrop participants for the following simple tasks. They also offer a referral program where you can earn additional EXY. Experty is listed on Coingecko.