Its possible to get the bitcoins you earned to your bitcoin address/your coinbase account or simply donate them to a charity.
Find more : https://21.co/ or http://www.coindesk.com/linkedin-killer-bitcoin-upstart-21-takes-on-social-giant-with-paid-email-play/
What are your thoughts ? I personally find it a good idea but I doubt anyone who is not famous will be able to use it and earn from it.
I only looked at the homepage and haven't signed up, but it shows a profile and says you can message them for $5.
That might work for a dating site, but for career development it is a sellers market.