You are posting like this is a bad thing, I think it is great, companies need to be held accountable for gobbling up personal data, and should be discouraged from collecting anything including email addresses, I get enough spam thank you.
You think email addresses are bad but the masses hate having to remember usernames. Emails aren't used for logins because of marketing (all those systems already had email verification in addition to usernames, thus email was required). Furthermore, without an email it becomes impossible to recover your account if you forget your password. If the app has no personal information and email and you forget your password (which most general users do) then it's impossible to recover your account.
So this law isn't going to discourage companies from collecting your email address, it just has the potential to add burdens to companies that end up with 1 million signups (even for a free website).
Using email as either Verification or Username has always been a lazy and insecure and should stop.
If normies can not recover their candy crush account and need to sign up for a new one in order to protect privacy i am find with that if companies like King stop collecting data
I am security and privacy first, convenience and "free" are about 1000000000000000 on my list of importance. If a lot of free sites die that is price we pay for better data security and privacy. i am fine with that.
I do however want ownership over my data, and the right to demand these companies tell me what they collect on me (often with out my permission see Facebooks Shadow Profiles on people that do not have accounts) and right to demand they delete said data.
Let's be clear that this law won't pass, certainly not as it is written. In the US, it's perfectly legal for websites to track your behavior. Should you object to this, you have a simple remedy: use incognito mode.