There is some value to what you propose since general non-program specific car rental topics can get lost in the current forum hierarchy. The current forum structure is more a function of the relative value of the frequent renter programs. I believe that the reason Enterprise and Alamo are lumped into other despite the fact that Enterprise is a huge company, is that their rewards program is really crappy, especially as compared to their sister company National.

In terms of companies, it is true that after Hertz sold Advantage they declared bankruptcy, but they were subsequently purchase by Catalyst Capital Group, a Canadian private equity firm and are now stable from a financial perspective.

Subsequent to the Advantage sale, Hertz almost immediately started up a brand called Firefly which essentially replaces Advantage as their deep discount brand, effectively mirroring the current Avis structure of premium brand (Avis), discount brand (Budget), deep discount brands (Payless/ACE). Dollar/Thrifty fit into the discount brand category for Hertz, but truth be told, Budget tends to have a higher quality product than either brand for a variety of reasons.