Hello Stuart,
Good question! A scheduled import only counts toward your daily import limit if it runs and does not depend on the number of events that it returns.
So, for example, if a scheduled import runs and no events return from Facebook, that counts as an import the same as a scheduled import that returns 1,000 events. It’s related to the number of times the import runs.
In other words, yes, you will indeed be counted for 150 imports if you are running a scheduled import on 150 Facebook pages once per day.
Does this help answer your question? Please let me know.
Cheers!
Geoff