This kind of thing is one very good reason to obtain backup gedcoms occasionally for folks who do their tree buildng online. Then you can download them to your computer as protection.
I doubt that the problem was the Black Friday ad - I think it may have been an issue with you possibly being logged in to two different tree sites here at the same time. I do not think TP's cookies keep track of that, I have seen it do things to one tree that I thought were getting done to another - like change the background.
So, just for safety's sake in the future, if you need to be logged in to two trees at once, log in to them from two different browsers that keep their own cookies. Like Safari and Firefox, or Chrome and Edge, or whatever two browsers you can use on your computer.