I've been mostly just commenting since I reached a million. Things aren't as fun for me here as they used to be, but I still keep coming back. clinkster has a way of keeping me interested, there's other users too that I can't stop watching.
I think there is probably a simple explanation for why you had stuff that didn't feature and I'll bet my bottom dollar that your username was not a factor.
If you like, I would appreciate it if you can take the time to send me links to your stuff that didn't feature on one of my memes. I really enjoy seeing those and maybe I can show you why some might not have made it out of the gate.
I'll say this, imgflip has upgraded/changed the website over 60 times in the past 6 months or so, I've noticed just before those changes are deployed there is a correlation to long submission to featured times and users saying their stuff didn't get through. I remember Dash and Raydog saying they were having occasional days where stuff wasn't getting through.