Restaurants are for everyone, every guest, whether you are staying onsite, offsite or a local.
- There is no way to tie it to tickets because you can't prove you will actually use that ticket.
- You can't tie it to deposits paid because a large percentage of the guests stay offsite.
- Disney 1000% needs the offsite guests from a financial point of view.
- Many will save money by staying offsite just so they can eat their way through Disney.
- If you have booked a Disney hotel you already get a 10 day jump on everyone offsite.
- If you decide to go to WDW or book inside the 180 day window that is on you.
FYI:
There are two kinds of dining services. One (and that is few) actually books fake reservations and sells them to you, I suppose with a coordinated drop/pickup. Disney can so easily fix this by putting all cancelled ADRs into a holding location that randomly puts them back in the system over several hours time. No way to coordinate. This will also stop all the coordinating on here. These are the services that are legit scalping reservations and they will go after for sure.
There are several services that are nothing more than a concierge or TA for food. They watch for a time to become available and tell you. You have to do all the work to get it and maybe you won't. These services are not doing anything more than what any of us can do, they are just being paid a watch fee to do it for you.
That said this came out today -
http://www.foxnews.com/travel/2015/09/09/here-why-cant-book-seat-at-disney-restaurant/