> sue Facebook for infringement, and then losing the right to use Prepack as a result. You do not lose the right to use Prepack. You lose the right to use wha

> sue Facebook for infringement, and then losing the right to use Prepack as a result. You do not lose the right to use Prepack. You lose the right to use whatever patents Facebook may or may not have on the technologies underpinning Prepack, if any. If you believe Facebook has a lot of strong patents relating to Prepack, the value of the patent grant is high, and the cost of losing it is high. If you do not believe Prepack is encumbered by Facebook patents, then the value of the grant is nil, and the cost of losing it is nil. > Tangentially related: what would happen if you did sue Facebook for patent infringement, and continued to use this software? In my view, almost certainly nothing, because I don't think they have any patents on the underlying tech. But if they did, then they'd be added into the ongoing patent fight, and would give Facebook marginally more leverage when negotiating the final settlement. I rather suspect that the patents Facebook has on other non-Prepack things would be much more decisive.