One big issue is that we're just not a good product fit for something heavy, so I would expect most people who want more than what we'll give them for $4.95/mon

One big issue is that we're just not a good product fit for something heavy, so I would expect most people who want more than what we'll give them for $4.95/month to eventually discover that Webscript is the wrong service for them. (For example, technology-wise, they should be using something that doesn't spin up a new Lua VM on every web request.) We could certainly adapt Webscript to be a better product for bigger workloads, but that would be a lot of work on our side, and that product might end up just being "Heroku but with Lua," which is probably a bad product. :-) I also doubt that your experience applies here in terms of those heavy users wanting 2x the use for 4x the price. At 4x the price, Webscript would cost close to $20 per month, and we would start to compete price-wise with shared web hosting or VM hosting solutions. I'm not sure there are really users who want something like Webscript for that price.