Chrono could really try to bank on that. Their deals usually aren't the best, but they would become instantly more relevant, at least for me, if they start offering 2 and 4 packs more frequently. But yeah, the age of 4-packs on Steam is long gone.One of the things I really miss on Steam are the 4-packs.
A lot of cool multiplayer games coming out lately that I would've liked to play with friends, but everyone having to pay full price for a copy makes it hard. Third-party key sellers don't really seem to offer it either (although having a discount on every copy, as is the usual case, does help), I think the last time I saw it offered was during a chrono.gg deal.