> other individual/team/etc taking a “we are the captain now” position rather than “this is great, look what we've done with it too”
The scenario is that someone opens up a project but says "I am not going to take any external contribution". Then someone else finds it interesting, forks it, that fork starts receiving attention and the original developer thinks to be entitled to control the direction of the fork? Is this really about "scratching your own itch" or is this some thinly-veiled control issue?
I'm sorry, after you open it up you can't have it both ways. Either it is open and other people are free to do whatever they want with it, or you say "it's mine!" and people will have to respect whatever conditions you impose to access/use/modify it.
> if the creator is particularly concerned about acknowledgement of their position as the originator.
That is what copyright is for and the patent system are for those who worry about being rewarded by their initial idea and creation.
If one is keeping their work to themselves out of fear of losing "recognition", they should look into the guarantees and rights given by their legal systems, because "feelings on this matter" are not going to save them from anything.