I dont really think cheating in mp is the reason we need more sp content, but we would definitely profit from more sp content. That being said, there are some great minds already at work to make it happen afaik, so be patient
Unfortunately singleplayer is free cheat. Cheat codes are enabled by default, when you are under attack by the AI, all you need to do is gift from the gods + open developer overlay and win
Possibly people are just curious / giddy with this new discovery earlier today. But by later this evening, in the TGs hosted by Chocapoca and Akentas, nobody even bothered to build a market and the thing was forgotten
My plan would be to introduce some counter-intuitive names for variables and waffle a lot of irrelevant nonsense in the source code of Autociv to make it harder to pinpoint the important lines.
I spectated a few games today and the market exploit was in 50% of them used. The state is quite bad imo. Maybe everyone is eager to try their new trick.
I don't see how atm. besides mod signing.