This is a very unfinished pitch deck for it: https://docs.google.com/presentation/d/1IZuPlSyVR0oVoQ8OQMFy... Basically I see it as a way to share samples/ quick portfolio and have it as an alternative to your existing photo sharing/ social media accounts. I think that can appeal to long tail general audience, if its a stay at home mom with vacation photos or a vendor sending samples to an art director.
I see it as it being very closely aligned to what IMGUR is, but MFile is more focused as a design solution. IMGUR is a social media channel. MFile is solely built to be a presentation and sharing tool. I think there is a large enough market that there is room for others, other than one dominant app like IMGUR. There are quite a few now and they seem to manage ok, except for postimage.org. But they are serving 1.8PB of images per month. https://news.ycombinator.com/item?id=12825719