why didnt they wanted to be associated with it ?
Legal reasons mostly. The source of the exploit and the coder for example was all secret and it was just a mess and nobody else wanted to claim it. Long story, but he didn't do anything besides make a private forum where one person shared a ton of information about how the exploit worked and the rest of us sat and watched.
Here is a throwback I made when I suicide posted on e90post, calling out Jason for over censorship of the forum(They would delete everything):
I got into a few arguments with Shiv(and that RomBinHood fellow who worked for Apple) about his Open source flashing tablet not actually being open source. They even changed their product description/name, this motivated me to start decompiling some popular bmw software looking for decryption keys or algorithms. The owner of that software offered to help us if I promised to stop posting the disassembly online. So if anything I did more for open source flashing than Sticky ever did, and yet I still played no real hand in the result. So I'm baffled about how he can tell people he was responsible for that software at all. In fact, I recall he took donations for the development of that software and then kept the money.