From the README file:
Q: How does the donation feature work and how does it affect my shares?
A: The donation feature is disabled by default and only does anything once
enabled. It queries the author's website for login credentials and contributes
up to a proportion of work to the author's account. While the overall
accepted/rejected rates will include this work, none of these will appear in
your own accounts. On exiting, the summary will tell you how many shares were
contributed to the author.
Some questions:
1. Does the
donation option work behind a firewall (with only port 80 and 8080 opened)?
2. How does it works? ... it will get some work from your site and submit it back to your site?
3. What site will query?
thanks