I’ve raised a support ticket with Open Collective to move all of our properties from TiddlyWiki - Open Collective to Open Collective - Make your community sustainable. Collect and spend money transparently. the latter is currently unused and is a much more friendly url.
I’ll update here with their response.
Adding for clarity that the current url is https://opencollective.com/tiddlywikidotorg and I am proposing moving to https://opencollective.com/tiddlywiki
The transfer has now taken place.
Frustratingly, the redirect won’t be in place for a day or two (!), I’m afraid. I’m just about to update the link on tiddlywiki.com, but would appreciate help changing any other links.
The redirect is now setup, and the links to the old URL will automatically redirect to the new one.