In some cases, the geofencing GPS tracker can even be used as a brand awareness tactic. This is where an up-sell incentive could also inherit play. It works almost like any marketing deal - give something away practically free then make a further offer that is impossible to refuse. You will make your money on the up-sell, not on the core offer.
geofencing for promotion, confirm you are qualifying your prospects supported supply and demand, and make an irresistible offer for the simplest results.