Hello, I have already 3 ads of adsense (the maximum allowed) on a page. I also want to put my own banner on the same page, that links to another website (a paid standalone banner, which has nothing to do with any advertising company on the web). Is this allowed by adsense's guidelines? Thank you.
You can do any kind of your own ads, as long as it's not from another advertising company that looks like google ads.