What "self" due diligence services would you like to be able to do before buying into a franchise? (brainstorming)

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I love the "unhappy franchisee" site, it can help you think of questions and concerns beforehand. Would you be interested in being able to understand revenues, area statistics, close down rates and other details? I feel like the current self due diligence solutions (besides google) are very limited. Thoughts?

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