I really don't see the point, yet another utterly limited and primitive IP stack for Amiga, and also this time one is supposed to pay for it - why bother?
Edit: The only thing I'd be willing to pay for, is for the sources to be released under open source license.
I strongly refuse to pay for binaries when it comes to Amiga these days, not because I cannot afford it, but because I have experienced how painfull it is with these binaries after relatively short time, as authors abandon them.
It takes effort and some highly specialized knowledge to port an old TCP/IP stack to the Amiga and make it compatible with the AmiTCP V3 API. This can be done in less than a month, in two weeks even.
If you were to try, I daresay you'll spend a lot of time solving one of the major complicated puzzles practical software engineering can throw at you. This can be fun and rewarding all by itself, or at least that's how I felt about it.
Problem is, this isn't the kind of challenge that just about anybody meets gladly and is satisfied to have overcome. Some people want their work to be seen, acknowledged, and they want to assume responsibility for it. I'm one of these guys.
The point of discussing how and if Roadshow 68k might be released was to find out who would want to give me, author, something in return for the work I did, and how that "something" could look like.
I take it you are less interested in these aspects of the process, and, well, you don't have to be.
If there is a need for another free TCP/IP stack for the Amiga that does better than the old AmiTCP and Miami products do (in your words, is not another primitive TCP/IP stack for the Amiga), has a completely free and open source code, it seems that it has not been satisfied. It could be that the amount of magic & energy it takes to make one of these things is just not present in the Amiga community any more.
So the next best thing you could get is this non-free, closed source primitive TCP/IP stack I've failed to find a way to release for the 68k platform in almost ten years. It could be much worse: nobody could care any more.