Bitfinex, Bitmex 10% off trades
When signinig up for a new acount on Bitfinex.com you can use this referrer code: ySIzJaEyfh and you'll get a 10% discount on the fees of all trades/swaps you do in the first 30 days! Just follow the link or copy the code.
So not only will you get a 30 day fee discount, also you help in keeping this my blogging online.
My BTC donation box: 3C36dWweXzJRQuDdyi2uRLYrHwMmWFZPLJ