The contributors to this forum are not ICE's "assets", but rather are customers (or for this incarnation of ICE, perhaps only potential customers). ICE has no more inherent right to profit from their ideas than anyone else does. Trying to claim the contents of posts on your website is an excellent way to drive traffic to an alternative site.
As was pointed out already, ICE itself has benefited over the decades by borrowing ideas from elsewhere.* Game design is an iterative process, and borrowing ideas goes back and forth all over the place. And it is also difficult to identify borrowing from simply finding the same solution to the same problem, as people can and do independently arrive at the same idea. Unless you get more specific, it is impossible to judge whether you are jumping to conclusions or whether there is actually a suspicious parallel to something posted here.
* - Critical hit and fumble charts were being created by fans for D&D before Arms Law appeared. Many, many of the structural features of the game came out of modeling (A)D&D back in the day. Indeed, even today, suggestions made to ICE for RMU have been argued based partly on "how D&D does it".