This is good. This is the kind of advertising that people here usually say that sites should be using if they need ads.
For example "Chess Life" mostly contains ads that are irrelevant to everything other than chess. "QST", a ham radio magazine, mostly contains ads that are irrelevant outside of ham radio.
This is what I most often see people here suggesting as the right model for internet advertising.
OP here. I actually feel that having ads that are relevant to the people reading are better both ways, as you might actually learn about a good tool :) (I try at least to only work with products I believe in).
I felt that having the ad between line dividers, and having this: "Thanks Linear for supporting today’s article!"
should be enough, but maybe I'm mistaken.