Multimining is a btc mining pool were you can claim 120 satoshi every hour.
Via this link you can join https://multimining.website/signup?referral=49994
This is 3 times more the freebitco.in and you can claim when you reach 20.000 satoshi.
They take a fee of 5.000 satoshi but you can save up as long as you want. I saved up to 33.600 sathosi and payed out, to see if it pays.
I didnt buy any mining contracts and wont advice anyone to do this. I dont know if it is profitable.
Here is the payments proof:

And of my wallet:
