There are two different "ads" we're discussing here. One is the ads reddit the platform allows you to pay for, and it shows up in the client(s) as ads. Another is the type of ad where a company reaches out to community members and ask them to post about their project/product in exchange for a static sum, which looks like "normal posts" but are actually sponsored content.

The first one sucks for a multitude of reasons, the second one you basically don't notice are ads, yet they're all over reddit.

Can't say I know how it looks everywhere on reddit, as I'm not everywhere on reddit, but the AI subreddits I referenced earlier are filled with it, and I've even received offers myself to get paid to pay about stuff and I'm a nobody, so surely I only know of the surface.