Unfortunately, many people make the mistake of not reading how Genesis Mining's contracts work. With the rising mining difficulty, their Bitcoin contracts are most likely to return positive results because they have no expiry date. However, due to their maintenance fee, if you want to profit from them then you need to buy a large quantity of hashpower. If you only buy a small amount, it's likely their fees will end up eclipsing your hashpower's production rate before you are able to generate a significant profit. This will automatically cause your contract to end.
RE: My 8-months of mining by Genesis-mining