There is a bit of work to configure this plugin - BUT - when we follow the instructions (in red - thank you) the plugin just works. The shortner i use is StumbleUpon.
The biggest issue is to always make sure we clicked the correct buttons to generate the api - so that it shows 'read and write' And then spend the time to configure all the wonderful settings you provided.
Anyway - a deep bow of thanks for this plugin. Happy New Year