I'm sorry to all the people who disagree with this but theft is theft.
Imagine you spent your time building something this elegant just for a bigger company to rip it off, and for them to reply with "oh it may look the same but we just used your template as "inspiration" and changed a few images." is pretty much an insult.
The only thing I don't agree with is that you can't price how much they would have lost, only estimate, and $20,000 is way over the top.