pardon my ignorance, but I gave up on Buzzr about 2 years ago and haven't watched it since, unless you count Amazon prime episodes.
This says "Super Password" 1985. When the network launched 4 years ago, they started with episode one. Have they really not gone past 1985 in all this time? For that matter, "Tattletales" is still in the second year?
Almost everything Buzzr/Fremantle has needs to be converted into a modern era format, likely into a digital archive. Even in cases where they clearly got their copies from GSN (A couple of late 90s GSN plugs even turned up in Cullen Price), that's still a DigiBeta to true digital conversion. (Why not just broadcast the digibetas? Number one, in an era of automated network control you don't want tape on air if you can help it; Number two, Sony discontinued the production of players and recorders for the format in 2016 so getting anything off of the format that might still be on it is a process that needs to happen anyway).
Plus beyond the conversions, the episodes are almost assuredly having to be screened for music issues, celebrity issues, contract-related problems, video and audio defects, and just about anything else you can think of. And all of that costs money (labor costs, time costs, equipment purchases, storage costs (professional storage plus backups is $$$), resolving any legal that can be resolved). All for a network whose carriage amounts to digital subchannels, Pluto, and Dish Network, plus limited VOD on Amazon.
GSN had the benefit of being a relatively early cable network in an era where that was still a big deal, backed by a company with even deeper pockets than Fremantle (Sony), all while being in a race to get on the air before Family Channel's planned competitor - talked about heavily in Broadcasting - could get on the air full time and claim the space.
Shriners seems more than willing to pony up for Supermarket Sweep, so it almost never cycles back - over half of the Lifetime version has run, and at least the first 40 PAX episodes have definitely been digitized and are on Amazon.
Largely though? They get to what they get to, as they get to it.