They will connect it to you sooner or later. Then it doesn't matter if it's dummy or "real".
[rant start] Similar thing happened to me recently (not restaurants, but language schools), I decided I would rather continue without services I need (even if it was e.g. kindergarten for a kid) than make (dummy) FB account (Whatsapp, Instagram included). I am more annoyed by big tech practices by each day (Google and Paypal even more). I really hate them all :| The only bigtech service I'm still using is LinkedIn (also hate it) and only because it remained as only connection to some old friends and acquaintances. They all really suck in any possible way [end of rant]
