A lot of visitors just want to see what kind of answers does this service give and don't care about specific website. They would happily look at earlier saved query which is much cheaper for you to produce.
Also if you run out of credits again, your site won't be completely useless.
For example, I poisoned the results for GitHub by pointing it at a gist:
> This website is about an underground club in New York City that is visited by aliens wearing Victorian-style clothing to listen to disco music and smoke catnip. It explains the history, patronage, and membership fees of the club, as well as how the club and its members maintain secrecy. Additionally, it details where the aliens come from, what they like and dislike, and why they come to the club. It also mentions the governor of Kansas and how the club was different in the 1800s and now. Finally, it provides information about the food served, the club members, and which of them is most and least popular.
> The website is about the 'Enchiridion', a book of stoic ethical advice compiled by Arrian. It includes nine different translations of the book from authors at different points in history, including the original version by the stoic philosopher Epictetus. The website also provides a comparison of all the translations, as well as more information about the project. It is an online resource for people to access different versions of the book and learn about stoic philosophy.