You can't expect a random non tech youtuber to review the code of a browser addon, and paypal just simply lied to them. Of course it lowers the even low reputation of tech channels like ltt and mkbhd, I would expect that they have at least someone in their team with a basic front end knowledge. But again, paypal is a big, old, trusted name (at least it's used to be), it paid them good money why would they expect it's a scam?

My most important takes:

• people don't understand what browser addons can do
• if a product is heavily advertised by youtubers/influencers it's probably a scam. Exhibit b: vpns