We always advise MLS clients that they should never provide access to listing data unless the access is subject to a written agreement. Data access for VOWs is no exception.
I’ve written a summary of issues to consider when drafting a data license agreement for VOWs, which appears on the RealTown website. The article is titled (not surprisingly) “Written Agreements for MLSs Providing Data to VOW Operators.” I welcome your comments on the post both there and here, whichever is more convenient for you.
As I point out in the article, our firm has a model document for this purpose that we can customize for clients. Contact me if you want to discuss that as a project.