A while ago I made a Twitter bot (https://twitter.com/HereHaveAKitty) with a friend. We used the face.com API to detect sad faces in photos in tweets (as well as ASCII emoticons) and reply with a photo of a kitten. It lasted about as long as yours before being suspended. We tried again (https://twitter.com/KittenDelivery) but that too was shut down.
That's adorable! Except the part where KittenDelivery tweeted some hairless kittens -- those are creepy. Anyway, my bot has (so far) always been unsuspended upon appeal, but sometimes it takes 3-12 hours or something.