When using this function: fetch_page_of_members_from_campaign(), you can only get up to 1000 entries. Meaning, if you have 5000 patreon supporters, the following will still get only 1000 entries:
Nope. It is a string. Its a cursor to the next page of exact result set, not a particular number. The only way to paginate it is to get the next cursor string and request that next page and so on.