Advertising your own apps/games in a different app of yours is still an ad.

If you click it, it will probably point to the play store to install it like any other ad.

Change the copy to "install more of my apps" and they will allow it.

Yes since they employed lots of manual labor, many false positive have hit me as well. And it's very frustrating.

But this is just another empty "Lets hate on Google". Following the guidelines this IS a deceptive ad.

Simple reply them in the policy form and they'll get back to you why within 2 days.