I don't recall if the previous games got Game of the Year Editions. But there is a BioShock Ultimate Rapture Edition that includes the first two games and all the DLC. So there is precedent.
LordAndrew's forum posts
I haven't played Twilight Princess in many years, but I somehow managed to remember that Agitha was from that one.
Sure, why not. If we're at the point where we're letting minor characters like Agitha in, I can't wait to see what other crazy characters they pick. The Groose is loose.
There are pages that are not 3030, but that's because they're not games. You don't have to worry about those.
Incrementing the offset should get you all game pages, unless a page is deleted while you're doing this causing another game to shift to a previous page and not appear in your results. That would suck.