This has nothing to do with you writing webapps as a side job. It's about having some way for those corporations to prove the people who are verifying your work are competent to do so. That is the _whole_ point of the PE stamp!
And it's not my side job anymore. It's my full livelihood. It doesn't seem any of this has teeth yet, but when will it? And yearly fees? This is so obviously nothing more than rent seeking.
Fuck it, I'll just move. Oh, wait, I can't. My wife has an electrical engineering job with a branch of the government. They also are not required to license themselves, and they write code that affects more lives than I do.