I've recently made the decision to switch to digital comics. One of my longtime hangups about them was the fear that the service that I bought them from would be discontinued and I would lose access to the years worth of books I had bought. So a couple questions? Is this an unfounded fear? If I am worried about such a scenario, am I better off purchasing books directly through each publisher's store (i.e. the DC App) or through Comixology? Does it make a difference?