I had no idea such a subreddit even existed. It sounds like /r/cantgetlaid to me, but clearly there is a market for (poor) advice and reading others’ stories, problems and complaints.

But: OP will be starting from zero. And even if he had 5.8 M lurkers, which he doesn’t, how many would sign up to his service, take pics of 100 items in their wardrobe and then be confident enough to receive good advice to pay for it?

I have no idea, but if almost 6 million souls want advice on Reddit, maybe there is indeed a potential market.