«Ethlance is totally free because it’s 100 percent open source and runs at no cost»
https://github.com/district0x/ethlance

https://cointastical.medium.com/freelancing-platforms-which-pay-in-bitcoin-e38be56166df

https://www.quora.com/Are-there-any-similar-services-to-Amazon-Mechanical-Turk
https://financialwolves.com/mturk-alternatives/