Thanks for asking, Ryan. I dealt a bit with user data when I was messing with Discuss.
As we know the core of Revo isn’t designed to handle a lot of user data, and I am trying to get that info into the documents, so that users will be able to make an informed plan.
One perhaps critical Extra would be BobRay’s ClassExtender, which is I believe the best Extra now for adding and managing user data. There may be other options as well.
Here is a list of possible extras, I went through the search and there don’t seem to be all that many. I have included stuff like Subscribe, for new users, in that the Communication section might be too broad already.