Hashflare is a payment cludmining service, the only paid service I use. I love the fact that I can reinvest all the btc I mine. I have invested in 5 MH/s and will within a month be able to reinvest in one more MH/s. Within a year when the original 5 MH/s runs out I will have minimum 20 MH/s and so on. This will give me real mining power with no more money from me.