Here's my two cents: You shouldn't be dumping your stuff in group galleries without justification for them being there. At best, it gets some attention, and at worse, it gets removed and you get reprimanded by the owner. Instead, market yourself to the owner of the group. Tell them why you think they should add it to the group collection. Make them want to display your work. It'll be much more satisfying and you'll get more positive reactions.
I am fine with group limits. I am fine with being rejected by groups. My problem is that when I go to submit stuff I don't know what those submission rules are. That is my problem. Stop taking me out of context.