@merompetehla Linux Mint XFCE is basically the same thing as Xubuntu, except without Canonical's bad proprietary decisions like snaps. It's much more of a drop-in replacement than, say, Debian.
If you are using Xubuntu 22.04, it should be possible to switch without reinstallation, as Linux Mint and Ubuntu are binary compatible as Mint uses Ubuntu's repos and only adds Mint-specific packages in its own repo.
I think they are just referring to the Ubuntu pro ads.
This is not spam. If you have random outdated packages from the universe repo on your system it will tell you that they would ALSO offer support for those if you get Ubuntu pro.
Maybe too often, idk. But Linux Mint will "fix" this by also running these old maybe insecure packages but not even offering security fixes.
People need to step down their weird Linux-entitlement horses, and get that Free Software is not free as in free beer.