Yes that is how they "test" them.
What I would like to say is that they can use the devices for a certain period of time, extract the bitcoin and then sell it later.
I don't say: product quality testing.
Yes that is what they do when they """""""""""""""test""""""""""""""" them to make sure they work before shipping to customers. There may be some unseen delays in getting products to purchasers because of these """""""""""""""tests""""""""""""""" last longer than expected.
I'm not talking about from it.
For example, the BitMain company is now selling the S9.
But the bitmain company has the S10 on hand.
The S10 has been tested for quality control and is ready to be sold to customers.
But Bitmain wants to sell the S9 on the market first.
The customer does not know his S10.
Bitmain is doing bitcoin mining with the S10 device.
On the one hand, the S11 device is being developed.
After completing the development of the device S11, it is selling the device S10.
That's what I want to tell you. I do not know how else I can tell you more clearly.