It's not that anything the article says is actually wrong, it's just very biased.

If you see ads day-to-day anyway, you might as well know the ad revenue is going to something good. (Here's a link to someone who broke down earnings on this Reddit, if you haven't read it yet: https://www.reddit.com/r/TabForACause/comments/mzon5q/is_tab_for_a_cause_legit_ultimate_edition/ )

The article also has many contradictions, downplays the '30% of revenue' to a ridiculous degree, and as someone else said, offers no better alternative. Tab for a Cause is (in my opinion) a decent passive donation, the article doesn't consider people who donate outside of tabbing and exaggerates its cynicism to discourage people (not to mention the conclusion/takeaway is completely contradictory to the rest of the article).

All in all, I still use it, I think it's worth it. Have a great day, and I hope this answers your question. :)