Speaking as a security professional, this is pretty standard practice for a solid user experience. I’m rather surprised someone in a privacy community would take umbrage at this because security and privacy are closely linked. When someone attempts to steal your account, do you not want an alert?
The easiest way to get rid of this email is to delete your Twitter account.
The point of contention here is not that OP doesn't like this kind of verification, but that he believes that Twitter is making up the sign in attempt to get OP to actually log in and report higher usage metrics in Q3.
I don't think OP opposes 2FA, at least not from the info he posted.
Numbers for the console that tracks these things go up, making the security features trend higher internally. Net win for user security.
Total logins goes up. This is a meaningless metric that doesn’t affect value to anyone but the most ignorant shareholder. Nothing changes for Twitter.
Links clicked through Twitter’s tracker goes up. Since the target and originator is a single user, this increases nothing. From a shareholder perspective, again, a worthless metric.
Twitter gains session data. Unless the user deletes Twitter while logging in, this is an intentional choice by the user to use the platform and give that data. Possible win for Twitter but it’s a win the user agreed to because their data is the product.
“Numbers go up” doesn’t really work here. Fidelity isn’t going to upgrade Twitter’s value from any of this. Even if we assume it’s a drummed up attempt, it gains Twitter nothing we don’t agree to give Twitter by using the platform.