this is a feature-request or suggestion, however you like (also i would like to tell that this plugin has very big potential and can't be abandoned).
Things are simple:
make another config (yml file) or, in existing one or this can be included in the existing/only one (can be more clean if we make another one just for this purpose)
-the feature is to execute command or do message (COMMAND|<full command here>; MESSAGE|<message to player here>) every X seconds of user's playtime, or X minutes (or X seconds but can be more than 60 seconds ofc)
basically this is it, i think this will be easy to implement yet so powerful, giving space for owners to make A LOT of things :)