My yeti/camso 120 2.5 by 12 wide came new with every other clip. My timbersled 120 2.5 by 12 has a clip on every rod. I haven't noticed a big difference in hyfax wear. I think there is a slight bit more vibration (every other clip) generated as the yeti rotates and contacts the rail. Otherwise, I have not noticed a downside to the every other clip.
When ewe run a very small driver and remove clips the track can vibrate and lose efficiency since there are only 2 teeth driving the track on some kits, The rolling smoothness is compromised . To really increase rolling efficiency add anti stab wheel kit, The rolling resistance is greatly reduced .
I switched from a fully clipped ts convex track to a half clipped yeti and noticed the hyfax now get sticky on the roads. I didn't think it would be a problem because the missing clips were on the bar without a paddle but it matters. I'll have to run scratchers now. The yeti track works better in pow but I don't think it has anything to do with less rotation weight. I won't ever remove the clips if I have a choice.