Maybe I missed something so please correct me, but from what I gather these newer versions mean whenever someone now updates they are suddenly greeted with a prompt to buy a license after 30 days when their previously installed version was perpetually free.
While I agree that work should be compensated and the plugins are quite good for their pricing, essentially pulling the rug out underneath people that might have used these plugins quite often is what I would call a "dick move".
I get it, there weren't many donations coming in and the level of work required to maintain the plugins and do support for them is quite something and doing that for free is a lot to ask, but equally I suspect if the plugins weren't free to begin with they likely would never have grown to that point. In a way it also alienates a lot of users that otherwise might not have the capacity to purchase the licenses. At least setting up another payment gateway to allow more international purchases. Coincidentally that's usually part of the reason people do no donate as they otherwise cannot use the particular gateway provided.
It's strange to watch this unfold and get a lot of attention while other portions of the forum seem to sit abandoned almost. I posted the other day about something and didn't get a response for two weeks now. I'm not entirely on board with Sketchucation expanding into the realms of paid things when it has been a bastion and counter to the inherent commercialization Trimble has embarked on with Sketchup. For this place and the plugins and resources it provided to just follow that notion is sad to see.