I am using Genesis Mining too. 1 TH/s of bitcoin mining is $150 where it is $120 on Hashflare. The maintenance fee on Genesis is 28 cents per TH/s. The fee per TH/s of Hashflare is 35 cents. So Genesis charges more up front but pays out more, where Hashflare is cheaper up front, but pays out less. I like that on Hashflare they will let you auto-reinvest your earning every day. And of course it is easy to find the 3% discount referral codes for Genesis which makes 1 TH/s only $145.50. Ultimately the payback period is shorter for Hashflare, but if you are looking longer term because Genesis Mining has lower maintenance fees that could extend the life of the contract. While Hashflare might make 34 cents a day with 35 cents of fees (not profitable) Genesis will still be making a 6 cent profit (34 minus 28). Both are good choices, long term Genesis makes more sense right now.