How To Spam Promote Discord?

Hey, I was wondering if anyone knew some ways to efficiently promote my discord server to gain a steady amount of members! First week I did a good job with botting Omegle to gain around 400 members nearly but after that mark, the pace of new members has severely slowed down. So I was wondering if anyone knew of any other ways to gain members for a discord. Also should say I’m open to spending money for the promo if it’s needed.