What u need is an animated gif or short video of someone straight destroying ppl. Like a marine solo flanking getting a double law kill and then cleaning up the rest 2v1 or 3v1. Then flash to the words "INFANTRY:

If u've got skill , you kill.
Are you up to the challenge?"

Then spread that as basically the inf meme....on 4/20 . It will show how fun inf can be when uve got skill and itll make new players feel challenged to get that good. In romulocks hours of footage im sure theres one example of pure carnage worthy of being used for this

Just to dispel the "Steam will rescue Infantry" nonsense - here's Subspace/Continuum's lovely graph: http://steamcharts.com/app/352700#All

Almost everyone in Continuum right now played it since the late 90s/early 00s.