I just bought it on spec. The terms claim you can install it on 10 machines! $1/box is pretty cost effective.

I've paid for xming a couple times in the last few years. Doesn't quite cut it with certain applications; various show stopper glitches. Really would like to solve the X Windows on Windows problem once and for all.

There are other posts speculating on the code base; isn't this just X.Org for Windows repackaged? Yes, it is based on X.Org. The publisher explains it on the site; it's X.Org with pre-Window 10 support removed and otherwise optimized and enhanced.

I've never seen it being sold at less than 75% off. "Limited Time Offer" you say, "technically illegal tactic" I read

Could you please explain the illegality?

At least in the UK there is some guidance and judgement around discounted prices being related to a price that was actually used in the past.

https://www.asa.org.uk/advice-online/promotional-savings-cla...

I'm not sure how much of it legally enforceable vs adhering to some code of conduct.