I have got 0 gold, $0 and 0€ from any of my addons.
However I also didn't ask for any donations in any way
(and I also linked no PP account or anything).
I did it because I like to help, because
I was bored and because I felt like
there was lacking something.
However it 's here like everywhere -
Most people don't donate if they don't have to.
So if you don't code addons that are highly popular,
you 're bound to receive mostly nothing. TLDR:
If you need / want to get something:
Scramble, minify, obfuscate and provide Premium- and Light-Versions
of your Addons (for Donations - I mean real Buckshots).
Because in the end Free is always considered Free
especially when people are anonymous - Take and Take.