This is indeed a very valid question which we take at heart at IntroNiche. It boils down to common sense. We strongly recommend that you:

• only deal with people you feel comfortable with
• never give anyone access or insights in your clients database

Introniche allows for cooperative marketing, not database exchange. This means that when you make a deal on Introniche, you agree that you will promote the other party to your selected client database in return for a similar service. This means that you will not have to give the other party access to your database. In case you need to verify each other's database prior to making a cooperative marketing deal, we recommend you use a certified and neutral third party like an escrow service. For email database, we recommend you have a look at the Direct Marketing Association or these articles on the BeRelevant blog.