Earn.com, Anyone? (anyone earning? experience to share?)

Do people know anything about earn.com? They pay in BTC (bitcoin) to answer questions if you are a subject matter expert in a number of areas (mostly tech based stuff though) in "Lists", such as:

Programmers,
BTC and ETH buyers,
WRITERS,
Plus users of various mainstream social media I'm betting Steemit folks use!
There are over 100 Lists total, though, and growing, it seems - as it looks like there is the ability for those searching for users to answer their inquiries to add more Lists.... so may be some potential here, who knows....

From the site, their simple explanation: "Earn bitcoin by replying to emails and completing tasks. Keep the money, or donate it to charity. "

From a Quora member explanation I found, " They were founded by Balaji S. Srinivas, a former partner of the renown venture capital firm Andreessen Horowitz (a16z), and have a who’s who list of investors.Crunchbase: 21.co Formerly called 21.co, Earn: Earn Money by Answering Messages & Completing Tasks charges people to send tasks or messages to other people or lists of people.You earn bitcoin if you someone decides to send you a message or task and you respond or complete the task. "

Could be a cool additional way to earn some crypto for some of you, even in small amounts...

I literally JUST found out about it via a crypto Facebook group (so to many it may be old news (?) ) so I can't add more than that really at this point, I may update this post later, or start a new one if it proves interesting.

I'm a NON techie type, so I'll see what Lists/categories of users/expertise needed I may be able to find to fit myself into, what the tasks and pay rate are...

Please comment and share your experience if you are a user or become one!