Our defense is getting stronger!
Immediately after launching our network was attacked by spammers. They were creating multiple fake groups with links to stupid e-commerce sites, which we had to delete by hand.
Now, with help from a web security expert, we have installed a new software which detects spammer registrations and blocks their IPs. But as we are still in beta phase, if you experience any problem or see an irrelevant group creation, please report!