Yeah, it’s strange to butter ACM that have been total jerks until last week, and would not have done anything if not for the pandemia (and will resume their behavior afterwards). Sci-hub on the contrary have provided a free service for years, more reliable technically and content-wise than any library service at any research institution I worked. They are the real heroes.
While I would agree in the case of other commercial publishers, at the end of the day the ACM is a nonprofit owned by its members that invests back into the community. I don't think 100 dollars a year is excessive for what it provides.
That $100 a year is a solid value to support the profession - especially if you take advantage of the Safari membership. Heck, just being able to point people, both executives and new hires, to the code of ethics has saved me several times.
Your point about the code of ethics is intriguing! Do you point them to the code of ethics before or after the fact? Or to push back against someone trying to get you to do something unethical?
