Refunds

Now that does make a lot of sense.  I couldn't see Red Hat paying Danegeld for a patent they
could prove was bogus; it just didn't seem in character for Red Hat, not to mention being
extremely poor strategy.  After all, once you pay Danegeld, you never get rid of the Dane.

On the other hand, bargaining for patent protection from the troll company in exchange for not
invalidating the patent they were using to threaten Red Hat?  That I can see quite easily.
Very clever, too.