I guess it's just easy to make money off of people who want the easy way out, who never search, or people who just doesn't like to experiment.
Support? The first crack of multiple maps/prom, speed density, and ECU codes/address are done by couple of the members here, these people are never known to the newer kids, all they knew are the common name brands. I am sure if you want to do any of the said above, all you have to do is ask the old time members here. It's not any harder then installing the DSMLinks per se, I wouldn't call it tedious at all.