@ThresholdEngineering How is that unethical. You use big words, but I don’t think they apply to S3D subscription. It is clear upfront to what you are subscribing, so to me that cannot be called unethical.
I know, many of us are used for workstation based software to buy the license and renew as needed, however in software land, on almost all platforms the usage rights are based on subscriptions. Complex software for pc or mac is increasingly based on subscriptions.
In your case, you should be happy because you now have the option to get this application at a reasonable price per month instead of a huge amount upfront (what seems to be prohibitive in your case).