Here's a little trick I've been using for a while and I don't see it ending any time soon. It's simple. Twiend 1 or 2 people to get the minimum amount of seeds you need for a new follower (mine is set to 2). The server doesn't seem to update right away when your seeds are used up (with 1 follower) and as such you usually get another 5-6 followers when your balance is at zero. So you followed 1 or 2 and got 6 in return. At peak times you can get even more than that.