FWIW, the obvious downside in attempting to email a property is that even if you use the aforementioned trick for Marriott, you have no idea where that email goes. Especially at limited service places it could get routed to the GM or Sales Manager's email which then turns into how long until they see it or it could get routed to a generic Gmail account where it could sit for ??? It's like using the chat feature where it's incumbent on someone from the staff having access to whatever the platform is or if they do have access, caring enough to be logged in and looking. This isn't a Marriott thing but a hospitality thing in general where property's never post individual specific email addresses but an address/link that could go anywhere or nowhere. It's very much by design.