Anyone can go to https://www.discovervr.chat/discover-creators/ and input anyone's email address there to receive occasional email from VRChat for a set of worlds to visit. The process is single opt-in.

It's impossible to determine from a single opt-in if the recipient truly wants to be added to a marketing list without verifying this is the case.

(To add insult to the injury, the page doesn't have an RSS or Atom feed available.)