I have another question - what do you think is the residual value of these cards and is there any secondary market for them? Of course I'd love to mine with them for years but you need to have some expectations for the entire investment cycle which means thinking about the scenario when these are not profitable and you have to get rid of them somehow.

I know that you should never invest anything you can't lose in this field but still, with GPU rigs for example you always have expectation for at least 50% residual value in the worse scenarios and there is a well-established secondary market. So I'm curious what's the situation with these, as somebody who hardly knows anything about the FPGA market.