I'd definitely pay something. I like to set up my classes as BLUFOR (SEALs, FBI, ISA) vs OPFOR (SDC, Mercs, Militia) in order to give myself a bit of artificial distinction between teams, so them using the same scorestreaks detracts from that a bit.
EMPTY [IIIII-----] FULL The WTF!?-o-meter is currently... Normal
Not to mention it gives a competitive advantage and they won't do it with micro transactions.
The reason I liked it, is I hate getting thrown into a game in progress while having streaks on that are going to be horrible for that map. With how bad some of the maps are, and how indoors they are. Some streaks are just pointless... I mean, Lodestar on Aftermath? Could be decent, however, I've called 2 in on that map and just exited out of them since the whole building was in my way (Like on outpost in MW3 with the Reaper/AC-130 mountain debacle.)