Replace failed SS2 component or upgrade to SS3?

I have SS2 and one of my keypads failed (battery leaked). I've been meaning to order a new one, but I got an "anniversary upgrade discount" for SS3. I waited too long and now it appears to be showing full price when I click the link.

Does anyone know if they plan to end support for SS2 at some specific date? I'm fine with SS2 and I like the landline backup, so I'm leaning toward just replacing the keypad.

I'm curious what the discount would have been. I have about 15 entry sensors, 3 motion sensors, 1 camera, 3 keypads, 1 keychain, 1 panic button, and 1 smoke detector. Is the discount only for some kind of base package, not all the extra stuff I've bought?

I also noticed the forums don't seem to be linked from the website and no longer have a search bar. Guess they're not really supporting the forums anymore either. Always hard to get info from this company without calling a person, but not a ton of good alternatives so whatever.