i think spam is totally gay. i'm just glad it was brought public instead of kept within a few certain teams.
the only reason i think spam is somewhat 'good' for t2 is because the fucking sensors and base turrets are nearly impossible to kill otherwise (in a match setting). there's not a great chance you can missile them down due to flare spammage, and sensors in particular cannot be taken down by a single player. when they have their own stand (like in surreal), you cant jump up there and throw a mortar next to it, so it's basically impossible to kill without a team effort or spam.
spam is gay, but it kinda balances out the relatively invincible sensors (and somewhat the base turrets too).