I have not done much to promote my groups so they are not very big, but Group Collector works great and does exactly what it is supposed to do. Simple to setup, and simple to use, it just gets all the data and grows your lists.

EVERYONE who owns a group needs to get it as it makes your groups management 10x easier, and for the price that is some of the easiest time to buy back you will ever buy.

And while this deal is gone (7/19/24) it is on Sumo under a the same name but newer page so just search "group collector" in the search box and you can still get the LTD. Get it cause it is golden.