Is it just me or do neither ISO8601 nor RFC3339 contain any timestamp formats that are windows file system compliant? There doesn’t seem to be a time format that doesn’t contain a colon.

2FA is still available in the free tier, it’s just limited to TOTP and email code based 2FA. The paid teirs unlock additional methods like FIDO2 and yubikey protocols. Even if you don’t use the advanced 2FA methods or any of the other benefits, it’s still good to throw them a little money to keep them running.