DoctorGOGgles: I didn't say that Telltale has a "fully patched" version without major bugs. I just know from a friend who bought Sam and Max directly from Telltale that their version doesn't have the problem with the invisible Sybil. Also most (actually all I've seen so far) of the Let's play videos on Youtube don't have the invisible Sybil bug.
So Telltale have a better version of that episode than the one they've supplied to GOG. Why they don't want to give the version without this bug to GOG, I haven't got a clue.
I'm just a bit disappointed that GOG doesn't pressure Telltale more to give us a better working version. I mean GOG are still selling Sam and Max Season 1 for 30$. It's not like this is a 20 year old game sold for 6$ which is almost impossible to still fix bugs for today.
Sorry, didn't mean to put words into your mouth - "fully patched" was only meant in relation to the Sybil bug and I was more specific in my communication with Telltale.
Regarding GOG Support pressuring Telltale - as I said, GOG Support respond was a bit on the secretive side which leads me to think that maybe they're not on best of terms, thus have no pressure power (anylonger); I wouldn't rule out that they've asked but got nth from Telltale.
As for the price - don't forget that price tags are not solely up to GOG, but pubs/ devs as well and I'll dare a guess that the current prices on GOG were determined in their (initial) agreement that hasn't been revised, at least price wise.
Anyway, I think we've derailed the thread enough :-)