So I have an idea for a free web tool that will basically allow users to come to my site, sign up, do some customizations and then they will be able to embed something into their website by just copy and pasting some code. I had planned to make money through putting ads on the embedded page, and also offering a premium service without ads. Where do you go about offering free web services? Has anyone had any experience with this kind of thing? Any advice or info is greatly appreciated!