A moral, ethical and religious dilemma

I still have the truck I bought a few years ago and it still has this on it:

As was the case then, it's not intended to be any kind of great theological statement on my behalf; I just like dinosaurs and think it's funny. I can see why somebody might take offense and all I can say is that's not the intent. Sorry, but your right to be bothered by it doesn't negate my right to think it's funny. Kind of a First Amendment deal, I guess.
My advice would be don't take it that seriously because I don't.

Flash forward to last Thursday and found this note on my window:

I guess she doesn't know I'm an ordained minister

It says...

"Hello : )
I saw your dino & fish on your truck
God is real
God is good
God loves you & I'm praying for you"

And there was a $10 bill attached! In case this has never happened to you, $10 goes a long way toward alleviating any hard feelings about a stranger violating your personal space to impose their personal religious views. $10 is real money! That's a meal (at a restaurant with a value menu) or a tank of gas (if your tank is smaller than what's typically the standard found on most four-wheeled vehicles)! Am I saying my spirituality has a price? No. But if it does, the bidding starts at $10.

So here's my dilemma: Am I obligated to remove the dinosaur, because she felt so strongly about it and I kept the $10? I seriously considered donating it to a good cause. But ultimately, I didn't do it.
-or-
Do I leave it and start parking near churches to see if I can cash in off of similarly-offended individuals? I'll seriously consider donating the proceeds, but ultimately, I won't do it.