I am pretty confident the spammers will remove the `+` suffix from your email. And this is why I find the Apple fake email building solution a lot better because they build a fully different email per service. No way for the service to be able to cheat and discover my real email address from the one I give them.
Still a smart enough system might be able to discover a valid email from my other id info, like my name. But this start to be a lot of work, while just `s/+[^@]*@//` is easy enough to do.