In order to send an invite at once on steam you'll need to follow these steps.

Open steam on chrome

Go to your friends list

Open dev tools and press console

Paste this script in

const groupID = '103582791470452434'; const friends = GetCheckedAccounts('#search_results>.selectable'); InviteUserToGroup(null, groupID, friends);

Hit enter and the invite will be sent.

By doing this the group can grow and we can get more people to Rep, Commend and Trade.