Refresh the Subscription data for the user when the user logs in. And keep the session times to a day instead?
Or, if you have channel permission, refresh you channel subscribers once (or maybe four times a day) and just allow that “free” access for that “short” timer period?
Theres usually a small window of delay for clearing up a sub, it’s weird but it should be dead, but seems to have a window
Currently the only way to calculate is to iterate over all the subs, but I think that sub points is gonna get added to the API as a few people have requested it. Who knows 