Go to global and advertise your clan, then invite everyone there who does not have a clan, and then go to the list of people on your league (if you have one) and keep scrolling down to look at everyone there and invite whoever does not have a clan. Also, give out free co for the first 15 or 20 people who joins, and put your clan on anyone can join, and put it on invite only once you get about 25 people. After getting that much people, do not give any more free co. But also do not kick unless they are too rude or they are a hopper. If you see someone in your clan asking for co, they might be a hopper. Do not put your clan on anyone can join when you have 25 people because then you will see your clan is being swarmed to 45 people, and this will cause you to lose more wars. Well... I hope this helps!