I made a post recently showing off a ton of different extensions to help you earn more money online. If you read that post and installed the MultiLogin extension (allows you to log in to multiple sites at the same time simply by opening a new tab), you might have noticed a lot of ads appearing around every website you visit. Certain words of this post might be highlighted and linked to an ad. Visit almost any site that sells stuff, and you'll be shown a huge banner at the top of the page advertising a site with a lower price (which is fake as well, actually).
I spent the last 3 days trying to figure out why the ads started showing up, and I just figured out that it was actually just this extension.
If you are looking to keep the extension dispite the ads, I would recommend switching over to https://chrome.google.com/webstore/detail/openmultilogin/plaahcaagklllbcjognjgcnldgjnjhpb/related” rel=“noopener nofollow ugc” target=“_blank”>this extension. It does the same things, but it does not have ads.