Provisional rights are intended to give remedy to a patentee who's issued claims were infringed during prosecution. See here.
On the other hand, are any sort of "intervening rights" (usually reserved for amendments during reissue, reexam, or PTAB trial) available to a commercializer who began use of filed/disclosed but not initially claimed matter that is later claimed via amendments or a continuation application? (Note that prior user rights would not apply.) It's a question of what is considered equitable public notice.
Consider the cases of an application that has claimed narrower than one would like to commercialize (e.g. originally claims 'ABC', but only want to use 'AB'), or the case of an application that discloses multiple distinct inventions that will be the subject of divisionals/continuations (e.g. application discloses 'ABC' and 'DEF', but only claims 'DEF' for now).
Do some form of "intervening rights" exist in such scenarios? Does the party interested in commercializing the disclosed-but-presently-unclaimed matter have to wait around for the patent term to expire to avoid the patentee explicitly mapping the claims to his/her product, or bear the burden of determining what subject matter in the application the patentee has a right to claim? It seems like this would be too big a burden on those performing FTO/clearance searches, but I can also appreciate that such intervening rights could be abused if too lenient.