@Scott - you don't need to spend money if you're on 6.3 as the licences come out of the same pool.
@David - yes WinMo 8 is much better than previous incarnations, not that that would be hard, but it's not making any ground up on Android or iOS and I don't think it ever will. Microsoft are just a little late to the party.
If Kaseya sold MDM as an auditing rather than tracking tool it would probably be better received. Blaming Apple when it's flaws are pointed out is a poor excuse especially when other vendors have gotten round this issue.