Donating/invalid blocks.

[mariokiller64]

So, To me, it looks like not donating at all and not getting paid for invalid blocks gets more bitcoins then donating around 2.5-3% and getting paid for invalid blocks -although more selfish  -, but I'm not really sure myself.  Which gets more bitcoins?  Donating around 2.5-3% and getting paid for invalid blocks instantly, or not donating at all  
Sorry, I'm still learning everything.