I don't understand why you would want to watermark text? How many people want to do that? Why do they want to? Text is copywritable (with the exception of text

I don't understand why you would want to watermark text? How many people want to do that? Why do they want to? Text is copywritable (with the exception of text on social networks, which you don't have the rights to - so why watermark??) You "really want this to be something lots of people can use". That's a good start, but you believe pricing will have a big influence on adoption. The way many companies deal with this (as long as there aren't prohibitive costs involved) is to give the product away for free for a bit. Have a beta, find how many people want it, how often do they use it, what do they use it for. Don't worry about it being to many, it will likely be 100% less than you think (yup, I mean 0) until you start personally talking to people and getting them to try it. Once you know how and why people are using it, you might be able to estimate how much it is worth to them, but probably not. You'll have to look at how large the market it, how many customers you can get, how much your costs are, and does the whole thing make financial sense for anybody?