I think the idea of the lists is a good one, but it requires support from the people. There will surely be many outdated lists after time that have been started and not updated. If there is an option to deploy somehow to user profile. For example, if I have an option in primal to create lists and divide users into groups to look at what is being posted by them in one place, this thing could also be used as a ready to follow list. The difference is that then I'm mostly doing it for myself and I'll make sure it's up to date because I'll be using it.