Those things seem fairly obviously not online culture but parts of "real life" culture that have an online presence, obvious to me at least. Video games and especially multiplayer video games are a core part of what you could call the indigenous online culture and serve the role of sport and to a large degree casual socialization. Their equivalents in the real world are team sports, board games and party games. These things aren't mutually exclusive and they certainly bleed over both ways but you can easily say that a game like Counter Strike is primarily online and a game like Basketball is primarily offline even though there are Basketball themed video games and Counter Strike themed in-person events.

To put it simply, it's a Venn diagram with two overlapping, non-coincident circles. The amount of overlap has varied with time but that doesn't mean online culture doesn't exist or conversely that everything is part of online culture.