The LDS church is big into genealogy and has a competitor called FamilySearch. No submitting DNA or anything, it’s actual genealogical research. I believe it’s free as well (could be wrong)

It’s not a calendar, it’s an appointment scheduler

You’re so close to seeing the point. Yes indeed that the restaurant should be able to see if reservations are being changed around and be involved in those decisions, such as being able to restrict how they’re transferred and charging fees to do so. Your first paragraph is what is needed and what the law is trying to get these third parties to do.

It’s not illegal to book a reservation and then turn around and give that reservation to someone else (scheduling conflicts, medical emergencies, etc) with the other person paying you for it. To me it’s a perfectly valid thing to do. The problem is that it’s being commercialized and creating confusion for both customers and restaurants who no longer know who’s booking their tables.

The problem, as pointed out in the first paragraph, is that these are third party apps operating without the restaurant’s knowledge or consent. The proposed law would outlaw what these apps are doing if they do not have a contract with the restaurant. I’m all for it.