dear minner owners bitcoin difficulty change 14.04% and you still keep the price same how we can profit

The short answer is that the price we lease our rigs for is driven by the market... supply and demand. It is driven by leasers like you.
The long story is... We're not going to lease you our rigs for the same or less than we can make on them by mining directly. That would be silly. Rig owners offer a service. We have these rigs sitting here, operating flawlessly, waiting for leasers. We paid for them, built, tuned, support, and monitor them. And we take on the risk of the market dropping out and getting stuck with thousands of dollars of worthless equipment.
Those are things that leasers don't have to do or worry about. There is always a premium that should be considered the "lease fee," and it is driven by the market. The more leasers there are, the higher the premium will be (on top of what we can earn by mining directly).
There are several rigs for lease right now at .009 b/m/d. There are coins that will bring you .007-.01 b/m/d. Mine one of the higher profitability coins, and hold them until there is a bump in the market price. That's how you profit.