Earning the Right to Use Viglo

I have been considering doing interviews with potential customers to ensure that Viglo is only getting those who are committed to Spanish fluency. By seeking out truly dedicated students, we'll be able to build a stronger community and sense of pride in the product. Viglo will showcase more success stories, thus motivating others to become one of those stories. I don't want to bring in students that will poison the Viglo culture with lazy behavior.

After just finishing the chapter about consistency (and the section about "Commitment") in the book Influence, I'm seeing a marketing benefit too. According to the author, getting someone to openly commit to something makes them likely to stick with it. The interview will be an open commitment that can result in continued "customership" with us (doubt that's a real word).

How do I feel about this though? Am I being a manipulator if I use this tactic? I have given this a lot of thought, and I realize that the answer is, yes... I'm being manipulative. However, if someone wants to become fluent in Spanish, then any marketing tactic I'm using to attract them is bringing them to a product that will help them achieve their own goals. Certain other language products merely want you to USE them. Whether you achieve fluency or not is secondary, unlike Viglo.