Extend your range of products.
Interestingly enough, I've already tested the water with 'map your own car' style products.
The problem is quality control, you need people to adjust responsibly, using equipment that wasn't likely to fail and using remaps vetted by ourselves - so we distributed some devices that allowed all-contained ecu programming and diagnostic facilities. The devices were 'light, single use only' versions of genuine tuning equipment from the same manufacturers as the tools we use on cutomers cars and the way the device worked the tunes would have to come from us, but meant we could supervise the tuning process from afar and not just give a 'heres a file and thats the end of it' but actually supervise, customise and adjust like we would in person.
There's absolutely nothing wrong with this, but the flaw in the plan was people wanted it for practically free. So I stopped stocking it - once again we do the full circle where a very small proportion of people just don't want to pay their due.
I'm not going to distribute files on their own, except to people I've agreements with to do this (other garages etc) because the risk of the theft of our development work. I was open to the above concession to try and enable some end user involvement and ability to swich tunes to suit their mood etc but its largely a waste of time in this self-entitled climate. providing this service adds to the costs.
Most people don't mind paying a fair price for a remap and we go to the ends of the earth to look after these people. We don't even oppose people tuning their own car, but that does cause problems which is why im now waiting for someone to pick up their replacement EDC15 (see previous page). Heck we even help people out who come a cropper, but the situation would have been avoided if they'd come to us first, and we do charge for the recovery obviously.