> I have nothing to sell (other than the French course). I’m just sharing my experience.

I like your project, but this ^ is blatantly disingenuous.

Disclosing your revenue is a very effective marketing move that gives you a lot of traffic and drives sales up. You cannot not know that and it's extremely unlikely if it weren't one of the reasons for the linked post, if not the primary one.

If you were up to "just sharing", you would've done it anonymously with the name redacted and no links to your website.