I'm thinking about mashing up (old term I know) two services but I ran into a roadblock when I came across Yelp's ToS. The lawyers drew this thing up so tight I can't figure out any legitimate use of their API and have come across seemingly conflicting clauses. Take a look, its good for a laugh http://www.yelp.com/developers/getting_started/api_terms.<p>My question is, what have your experiences been with approaching companies about their API terms? Is there a good way to approach it? Obviously my biggest fear is spending the time to develop the service only to have them shut it done.
I "love" clause 6D:<p>"You agree that you will not, and will not assist or enable others to: use the API on behalf of any third party;"<p>So in other words, no one can use the API except to get Yelp information about themselves.<p>What a fucking joke.
Use APIs in ways that add value to the provider (i.e. you're paying them or adding value for their users). If it's in their interest to keep you alive then then they're most likely to keep the API going.
Sometimes the terms might be more restrictive than is actually enforced. Doesn't really help with your fear, but if you avoid undermining them in every way you can, it's probably less likely that they'll try to cut you off. Having a backup plan (Google Local API?) probably isn't a bad idea, though.
Contacting them is your best option. Find some one to talk to, explain what you'd like to do, and how the terms restrict you, and see if you can't find a way to have an exception, clarification, or some other way around it.