Entirely agree.

What a lot of people also don’t realize is that free (as in “freedom” and “beer”) software runs most of the world. The proprietary stuff like Microsoft and Apple systems are all at the consumer level, which is dwarfed by the number of Linux-based machines out there. And Linux is entirely free! No built-in tracking, ads, monetization, subscriptions, etc.

The phrase “if it’s free, you’re the product” is excellent advice when dealing with proprietary tech. To my knowledge, OP’s site is not free (as in “freedom”), so it’s warranted to be wary. As you mentioned, there are several ways to test OP’s claims and it seems they check out, as far as verifiable.

But it’s also important to keep in mind that there are millions of individuals across the world who just want to do good for others through contributing free works to society with no strings attached!