Sure, if you are /actually/ paid using bitcoin. I think what is being suggested is bitcoin is really used as an interim currency, or transfer protocol - to avoid the cost and time of current international banking processes.
Therefore, you would still be paid in a real currency, and the underlying number of bitcoins used in the transfer is not relevant.
However, this product seems to be suggesting paid it bitcoins - which I would also not be able to accept. :)
I do think it would be a nice thing for speculative side jobs, though: The extra income gets stashed away automatically, and I would only look again at it a few years later :)