It happened to me too, with my simple site for generating acrostic poems [0].

It would only show the poems create. I tried Adsense, was rejected for lack of content (probably, because they are mysterious about the reason they reject you). Then I tried adding lists of words starting with the letters used as initials for the acrostics. Rejected again.

Then I gave up, and decided to use affiliate links.

[0] www.acrostic.ai