Because they're the next best thing to the Bee+CC combo. Sand hawks and fibbers werent affected by the nerf like the CC was. So, naturally, people want to find and use whatever crutch they can to get through a game.
Doing the best we can to farm 2.5 solo. Or at least that's why these are relevant to me. I only have internet on my phone, and can only get online at friends houses on weekends. Luckily I have an extra 360 if I wanna play patch free off-line.
XBL GT: BROK3N THUMB5 (The O is not a zero, E=3, S=5)