The title with quotation marks is a tiny bit misleading; I was expecting this to be a blog post or something where Paypal advised developers to handle user-generated urls with care, which would have made the paypal.me mistake (first discussed here yesterday[0]) that much more embarrassing. In truth, it's a quote from a post submitted to Reddit about an hour and a half prior to this one [1], making me think the url should probably point to that (or the quotation marks removed, since it's not really quoting anyone, but then it's a straight up dupe of a Reddit submission).
[0]: https://news.ycombinator.com/item?id=10152224
[1]: https://redd.it/3jd1bj (from Artemis2)