actually, from what i can tell, the makers either request or get the needed package/info or code. especially if their users request it, which they often do, and it allows them to avoid making rtas.
here's an example of a company with an update fix in regards to the wrapper QuikQuak. Audio plug-ins for PC & Mac. FX and Synths,
they have a website and forum which anybody can join and they have an updated incompatibility sticky thread Fxpansion.com :: View topic - Incompatible plug-ins thread
. ni issues with pt8 are also available here at gs and other sites, as far as most vsts, no problems for me (but i'm on pt 7.4) but that may not be true for others, like any other software.