You can't run xexs with the exploit, the code runs in "HyperVisor" mode, which basically means it runs without any of the limitations OR benefits of the HyperVisor, meaning you can't run xexs.
You need a 360 with a base kernel of 1888, which means around launch. The downgrading to the dashes means to the exploitable dashes so you can use the King Kong exploit to run unsigned code.
Even if you could build CON files and put the maps in them and get them to show up as DLC in the game, you'd still need to resign the map file, which we will never be able to do.
I can't talk for them, but the amount of s*** they got for their hard work doesn't really balance out, while some people congratulated them, they got people saying they were lying and that they could mod on retail but were just hiding it, and that they were just bragging. And s*** hasn't stopped, if people are going to leak and steal stuff created by other members of the community, why should they share?
In my view, the point of public research has always been to allow the public to expand on the research. In this case, the public already has a great deal of research and they are doing nothing to expand it, so why should the people in the "circle" give them anymore?