Don't know but even if they offer, are you going to purchase that? Don't do that man or you will lose your bitcoin while you have hope of profit. They pay you at first but then payment decreases, decreases and however it dissapears and reason is high difficulty + contract can't cover it's electricity fees. So don't worths, better to buy miner and mine yourself, you will know what you do and can avoid thinking about scams and etc.
There are many cloud minings, see my previous posts if you aren't busy (I post about it somewhere).