@derek I like having products present on Contrail for example. I got a number of planes from the JF store, and Contrail picks up, e.g., the BAe 146 installation and shows if a new version is available. It's the same for the SWS Kodiak 100 which I got directly from the SWS store.
Even if I cannot download it from Contrail, having the notification consolidated somewhere in the 4 or 5 store apps is nice :-) (And the update mails from the JF store can be a tad delayed.)
Having all the revenue from the sticker price is of course nice, and I usually try to "shop local".