I’m not sure if this is the information you mean, but as far as I can remember the relationship between the plugin version and the free, open-source product has been basically stable, and openly discussed, for over two years now.
As far as I can see, the name change is the only way this differs from the structure announced in the development blog on June 2019:
And here’s what the FAQ said in April 2019, the earliest capture of that page on the Wayback Machine:
Shortly after Rack 2.0 releases, Rack will also be available as a 64-bit VST2 plugin for around $99. VST3/AU/AAX versions might be released afterwards. All Rack v2 plugins will be compatible with the plugin version of Rack. The primary “standalone” version of Rack v2 will continue to be free/open-source.
Looking this up, I was a little surprised, as I had forgotten that even the VST2-first release was planned!