It's possible to acknowledge that the act is equally unethical and also relatively much smaller in impact. Not all offenses against humanity are equal. I've had friends who still owe me more money for something two decades ago than the author of mIRC does for my "lifetime" license, and they don't give me anxiety either.
> If a local small business sold me something at a price a little low (so they still made profit, just less than they wanted) would it be ok for them to take the thing away later and demand more money for it?
If a local small business sold me anything for US$20, provided continuous support for it for more than two decades, and then asked if I could pay another $20 to continue to get support for it, I'd tell them it was still at my parents' house and probably got sold in a garage sale years ago.
Nothing I've ever purchased has gotten 23 years of updates and support from its creator, much less something that cost $20, even in 2015, 2005, or 1995 values of $20. Is it normal to receive this service? I'm thankful for the two decades of updates and support, not upset that the author didn't believe mIRC would still be relevant to anyone after nearly a quarter of a century.