This seems like it should be in the off-topic section. Just saying.

Well its still kinda on topic.

That's a very stupid idea - annoyingly spamming shit about a game is the surest way to just make noone want to hear anything about the game.

annoyingly spamming shit about a game is the surest way to just make noone want to hear anything about the game.

I'm not really sure that's exactly what OP had intended. For example, r/gaming has a chart in the sidebar of what redditors are currently playing, which is tracked by sending private messages to a particular bot account. I'm hugely into Dwarf Fortress and we (r/dwarffortress) once banded together to get Dwarf Fortress into the #1 slot (for a long while, too). It brought lots of attention to the game and grew the community, without being obtrusive. All it really did was pique peoples' interest.