I asked the same thing when I joined. Socrates told me this " The key to my "success" on imgflip (if you want to use such a generous word for such a lame thing) has been nothing more than to make funny and light-hearted meme comments on front page memes, and to keep doing that consistently."
Commenting on a lot of the consistent memers will help get you seen and people will start checking you out. Believe it or not its a lot of work lol.
But above all just have fun, if a meme fails try try again! :)
Caption this Meme
