I have to admit I wasn't thinking about any sort of bonus, but I had a couple people kind enough to give me ink. (I didn't expect any.) So I guess, I'm going to do an inks-giving related piece for everyone that gives Ink to PPP.
I'll do the bonus Illustration no matter how much ink I receive. I'll do a headshot sketch of one of my characters. (Ink-giver's choice)
If I receive more than 5000 ink drops in total, I'll go all out and do a Pirate-costumed Princess fighting a giant squid for everyone. (Get it? Because squids shoot ink?)
So here's my comic, if anyone is interested.