As you guessed, your what if question has been brought up in the past. Although none of us have seen any of the licensing agreements signed to date I think that from what we have learned from the company at the shm and in the various releases that these are almost assuredley one shot agreements (all except the AMD deal).
To expect royalties or additional funds of any sort from those companies signed to date would probably lead to disappointment.
Of course this position is based on what I know and as I do not know much if anything and as recent and future negotiations can always bring changes to agreement terms anything is possible.
Expect less be happy and surprised with more!
God Bless
marc