Not to worry, there’s been an official announcement on this:
I haven’t seen how long the release sale would last, but this is a pretty common model for audio software now and in my experience a two to four week period is typical. There might also be occasional sales after release (as there are for paid plugins, including VCV plugins, in the library)–I’m speculating on that point, though, so if you can buy it for $99 during the release period I would do so.