But you aren't checking to if your users are willing to support it and honestly you have almost no way to reach your users. Your users have no reason to visit y

But you aren't checking to if your users are willing to support it and honestly you have almost no way to reach your users. Your users have no reason to visit your site, most probably don't even read the about page linked to in your output. If you do implement donations you need to some way more than just adding a donation link in the output or to the about page. I'd suggest trying to drive some traffic to your human readable site once you have donations setup. The only people that will probably care enough to visit your website and see a donation button are the people that are about to use your service for the first time. Unless they are just stumbling across your URL in some stackoverflow post and then you'll probably never get a chance to connect with them. Create several tutorial pages on how to call your service. Create a library for people that don't know JavaScript enough to use XHR. Make a library with XDomainRequest support so IE 8 & 9 will work with CORS. Make a jQuery plugin, etc, etc. Don't do it as blog postings, make a real tutorial section. Every single code example you create should embed the donation URL as comment.