We have put out 50ish proclimbs and only had one blow a belt so far. Have had to reshim every one so far.... Ran a XTX Dayco belt on the bosses with good results. Changing the belt is very easy once the foam is removed.
1; pretty sure there is a sign at the bottom that states "ride at your own risk".
2; if you watch "mountain mod mania", pretty sure there is a shot of ozone warning everyone at the cabin at the beginning of the day of the avy danger for that day.
3; avy happened after the bis event day was...
this is equipment that can save your life and the lives of your riding buddies, so I personally think prices should not even enter this discussion. go with what works best and always works! another vote for ABS! their track record speaks for itself.