You could try adf.ly. You get pay $4 or something like that for every 10,000 visitors clicking through the link. So in essence, you get your url shortened for security and other reasons, and you get pay for sending the traffic. It's a win-win situation. You can also google around a little bit. I think there are few others around.
bit.ly? I don't use it. But I see thousands of people and businesses are using it for shortening their urls, especially in social networking sites.
I saw a lot of adf.ly ads, I don't know how much they pay but they looks promising for url shortener website.
I think adf.ly is the best sponsor for URL shortening where you can get more money per thousand of visitors than others.
I know url shortener better than adf.ly. It's Ulmt.in. I don't like adf.ly because of: 1) delays with payouts, 2) contacted with their customer service - no results.
I still prefer to use Google Shorten URL because when we use their shortener, the click likely high because Google shorten URL is highly trust able compare to others.