To emphasis: During check out, they still have you add your email and phone (for receipt, tracking, etc). It is transactional in nature, but the company still has it and likely saves the session with a cookie.

Rownd is trying to fix this: Why not treat everyone like a guest the first time and if they want, when they come back, they can verify phone/email (or wallet in the future) and then the rest is filled in.

99% of the time I "continue as a guest" because it is easier than going through the hassle of email (verify), password (remember or pw manager), and the 9 other questions they ask before you can actually check out.