Hashflare has been around for years, and even though people are screaming scam at them, they have been paying out since they started and have proof of mining on their Facebook page. People get paranoid when it comes to cloud mining because of how easy it is to be a fake cloud mining provider aka ponzi scheme. Hashflare charges $0.35 for every th/s daily. One th/s = 1,000 gh/s. So, for your investment of 3 th/s, they would charge $1.05 a day in fees. With these numbers, you would pull in ~$45 a week after they take the maintenance fee.

$45 a week is $180 a month. You would break even in around two and a half months if today's market conditions stayed the same. Bitcoin's difficulty re-adjusts (and usually goes up) every two weeks to compensate for all of the new miners joining the network. Another reason why you would break even so quickly is because Bitcoin's price is skyrocketing. If it was to crash, so would your earnings. If you think Bitcoin will not crash within the next 2-3 months, go for it. Go with your gut! And always, never invest more than how much you are willing to lose.