They have to do with eldentyrell (as his post said). There is no price mentioned only that eldentyrell has put many hours into the work and wants money for the time spent. But no one knows how much $$ will be needed for eldentyrell to release the code, if it's ever released. It seems that the alternative is to
have people send boards so the encrypted bitstream can be loaded. Not a very popular idea I'd say.

I would expect that all the currentt board makers based on the xilinx xl150 would really like to get 300MH/s per chip.