Over time your userbase will form a power law distribution (in terms of success/scale) and you may end up having to support a lot of free users for a small mino

Over time your userbase will form a power law distribution (in terms of success/scale) and you may end up having to support a lot of free users for a small minority of paid users. Folks already pay for hosting now - so why not charge them for all the added value you provide? This will scale in proportion to your infrastructure demands. I'm paying $20/month for a VPS slice that runs my blog. I'm sure there are plenty of people who'd be willing to pay at that price point for all of the added value that Djangy will provide, on top of hosting. There's no need to take my word for it though as this could be validated/tested quite easily.