to bitmaintech has cloud mining on their website.
https://www.bitmaintech.com/productDetail.htm?but they do not offer a $15 dollar contract.
no company will give you a 15 dollar contract that has good value. But this is my opinion.
your problem with a company is they will stop mining if prices fuck them.
I have a pair of sidehack usb sticks.
https://bitcointalk.org/index.php?topic=1086011.0they cost me about 14 watts to run that is 11 kwatts a month.
If I point them at your pool you get about 27gh.
If I gave you 6 months time with 27gh my cost would be about 12 bucks So I want to make money renting to you. so send me 15 I make 3.
you may get back 12 to 20 bucks.
I not saying I would do that for you. I am trying to show you why you can't get a good contract from a mining company.