On mobile if you click the link above,you should be able to tap the rectangle with an arrow in it (should be in the top right corner) to request join.On browser there should just be a request join button there. If you're on browser,leave the "set as clan" box unticked when you apply as it may return an error saying we're full.The group size is unlimited but Bungie limits clan sizes to 100 per console.If you still want a clan tag you can apply to join one of our auxiliary clans.You're not required to carry our clan tag if you don't want to though.