Go ahead and report it to the Mint team. Even if it is an issue upstream, they will verify the issue and then report it as well. Never hesitate to report a bug you find, especially if it’s a security or privacy issue.
Even if the bug is a duplicate, it helps to know other people are having the same issue. At worst they will mark your report as a duplicate, which will let you know they are aware of the issue.
Or maybe websites can go back to simple ads that just have a picture with a link. Modern advertising is about harvesting your data, which is why I use an ad blocker. They also use a ton of resources that slow down websites.