Surely if they are that confident in their product then they should pick up any bill for getting your previous map put back on if you are not happy with theirs??
I see what you're saying, but really the risk (if any) would be minimal--it's a shame to hear of all of these tuners charging to reinstall their maps on peoples' vehicles. That's never something we would do. If customers are strongly considering this option, then surely it's more than a cost comparison. Maybe they're bored, curious, or want to conduct their own tests before choosing. Nobody is forced to do anything here, but what offer is a simple path to see what it's like. Worst case you leave with an OEM map a free dynograph and the ability to say you've compared the software.