I sometimes mention or even recommend a certain exchanger for a certain task. You could consider that advertising, but in my opinion an occasional recommendation (when appropriate) is different than someone who recommends a specific service in all their posts.
In my case, I'm continuously observing ChipMixer posts throughout the forum, but I had never linked MyCryptoMixer before. Also, whoever advertises a service in every post they made, surely do it worse than an occasional recommendation. So, a constant advertisement for a product is worse, than the latter.
Whether that's a good thing or a bad thing is up for you to decide.
But, up to mods to decide my posts' fate. Nice post, though.