I run an API service and was recently contacted by a professor at a university asking for a discount for a subscription with my service. They are asking for more than 1 million request, which would run for about $1k. However it would only cost me about $100 in server cost. I want give it to them for $1 so I have some kind of record and accountability if my service gets abused.
What are the pros and cons? What would you guys do in my situation?