I hope you'll forgive me for the necro, but I stumbled on this thread and found it amusing retrospectively, after Nikon acquired RED earlier this year. There's indeed been speculations that the settlement had something to do with the acquisition.
Regarding the "why Nikon and not intoPIX?" argument, though, while the money argument makes perfect sense, I think there's a little more to it.
The lawsuit mentions a series of RED patents, but most of them claim a camera - or an electronic device - with memory, sensor, and a compression method. Only two, US9436976B2 and US9521384B2, first claim a compression method. I think the red-green, blue-green parts are indeed a problem vs RED patent, but an SDK or a codec would have been more difficult for RED to attack because one can't patent only a method in the US; it must be backed up with a device, which RED did with a camera + memory + sensor (we have a somewhat similar constraint in Europe). So it falls on its users. Then, of course, the gain was perhaps less interesting for that company than waiting for camera vendors to use that compression technology and sue them instead of those who created the codec.
The fact RED was allowed to patent such a broad a vague method in the first place was an aberration.
I wonder if Nikon will keep using HE raw in their future cameras, now that they have an alternative that is (I think) more widely supported...