Moving back to WordPress

Hi, I wanted to move my blog back to WordPress.com, but I had a couple of questions.
First, will I lose all the Mailmunch followers I have obtained with the plugin.
Second, is there anyway I can prevent that if I will lose them.
Third, will I still be able to have no cap on image files? For example, before when I was with wordpress.com I reached the cap for images, so I had to upload my images to Photobucket.