Now that's a name I haven't heard in a while. Yes, funny story, Twitter at that time was threatening to cut off our API access due to us trying to trademark "Twitpic". We had been in the process of trying to trademark our name for many years prior. Our initial application hit tons of hurdles with other Twit* marks (my fault for filing late). Fast forward about 4 years after we'd finally worked through all the issues which required us to file a whole new trademark application and this one ran afoul (pun intended) of Twitter's legal. I assume that in 2009'ish when we originally filed, Twitter either didn't care then or we weren't big enough to be a threat, but I guess that changed in 2014.
Long story long, I basically ended up giving Twitpic to Twitter (I wanted the photos to live on). We were already feeling the squeeze from their own native image feature plus some
other compounding events like Google Adsense banning us out-of-the-blue with no recourse that really affected our margins [Hey Google, you still owe us $100k+ ;)].
It was one of the best, most educating times of my life. Just thankful I had that opportunity to run Twitpic for those years, God blessed me.
The End.
P.S. I'm still tinkering https://ark.fm