Note that Google and Facebook have effectively the same level of founder control, albeit with different implementation details. Google even had to issue a new share class in 2014 so that the company could issue more shares without the founders giving up voting control. Snap's approach seems like a more robust long-term way of telling investors that they don't have a say in things.
Yeah, that was especially shady IMO, and I was surprised back then as well. But I thought that was an exceptional case since it was the only company doing that, and it is so profitable etc. But if companies/founders can get away with this, what stops it from becoming the standard?