It's a common pattern to use +*default when we almost wanted *content, but want to be able to tweak the form for individual cards (without the headache of doing it via *self). For example, on Blueprint cards here on wagn.org.
If "|set|+*edit inclusions" (Toggle) is yes, then edit mode on cards in that set default to the inclusions subtab.
+discussed in support tickets
+relevant user stories