Pi is a new crypto currency you can mine from your phone. It's in invite only beta right now. I think, since it's starting to be assigned a price, that a move to "Phase 3" is imminent, and the amount you'll be able to mine if you sign up will halve (It's better to get in earlier, like with any crypto). If you want to check it out, here's my invite: https://minepi.com/ChrisBuck (invite code: ChrisBuck).
I recently visited the /earn page on Coinbase. I don't do much trading there, but found learning about different coins to be pretty interesting. And then I got rewarded with $40 worth of Stellar. I sent the invites to a few friends, but they had either already learned about Stellar on Coinbase, or weren't eligible.
So, if you want some free coin, you can use this invite. I currently have 4 invites left, and I'll edit this post when they're gone. If you claim one, you can not only get the $10, but probably get the additional $50 for learning about Stellar. Just make sure you're eligible.
4 invites left at: [https://coinbase.com/earn/xlm/invite/vcr2z6d3](https://coinbase.com/earn/xlm/invite/vcr2z6d3)
Happy trading,
Chris