Just like many people here, I'm a big fan of books and hence this software. I could never imagine, very honestly speaking, that managing e-books would be this easy. Since then, I've always wanted to pay back the volunteers of calibre back in some form and what I'm about to suggest might just do that in the best of ways.
I recently started working as student help at the company behind Adblock Plus. It's a browser extension that blocks ads with about 60+ million active users. Since the content on the web can simply not be made available for free, ABP believes in the acceptable advertising initiative. Such advertising is based on a certain criterion which if met, could allow ABP to not block the ad.
So I'd like to suggest the developers/caretakers of this link (
http://calibre-ebook.com/download) to get themselves Whitelisted and have an instant access to 60 million potential visitors.
Since book readers are generally well-informed people and are more likely to use ABP (in my humble opinion), I believe it is going to help generate increased revenue for the website.
The BEST bit is that it's not going to cost anything to get Whitelisted.
Here's the link to application for WhiteList:
https://eyeo.com/acceptable-ads-application.html
And here's the link to Acceptable Ads criteria:
https://adblockplus.org/en/acceptable-ads#criteria