I respect the effort, but i would advise against storing your images into steemimg now, simply because it's extremely easy for the person behind the service to pull the plug, considering that he's relying on Steem to gain funds for upgrading. The last thing you'd want is to lose all your images from your uneditable posts. A service like imgur is 99.9% safer. The only thing i would choose besides imgur or flickr would be an incentivised decentralized storage setup like Sia/Storj or Maidsafe. But that is reserved for the future.