In this experiment on Valk Exclusief's web site, a reason was provided for why the e-mail address is being collected. Google translation of the added text is as follows: "If your e-mail address is not yet known to us, we will ask you to add some missing information. Then you immediately benefit from our benefits such as the ValkLoyal savings program."

In this experiment on Valk Exclusief's web site, a transparent overview of the benefits for booking hotels was shown. The copy translates to: "Why should you book here? - 5€ Loyalty Discount - Best Price Guarantee - Discount On Packages - No Reservation Costs. Valk is a 150 year hotel chain in the Netherlands.