Chip,
You're absolutely right about this. Your downline will quickly recognize your level of committment to their development and success, and will respond accordingly. If they see you are always ready and willing to answer their questions, and provide them with duplicatable marketing techniques, they will stay in your organization forever. If you just don't care and are only looking for the new signups, they will leave you in the first week of membership.
You cannot look at members of your downline as $$$. They are other network marketers looking for a way to make money and find success just like you are. They have motivations, they have concerns, and they usually have a history in the industry. Develop those relationships and HELP EACH OTHER. You and your entire organization will benefit over the long term if you remember that.
Merideth