254
Though in the case of Steam, #3 is a bit questionable
(lemmy.dbzer0.com)
OP, modified to add piracy section
DDS stands for digital distribution services
1 doesnt make sense for linux or piracy. neither of which involve "buying", but simply downloading.
Some Linux distros needs to be purchased. But that piracy forum should obviously be replaced with gog.com if we're talking about buying stuff