Why Develop Someone Else’s Domains Free?

Recently a forum member posted on one of the domain name boards he was looking for a reliable partner to develop his (no traffic) domain names into developed websites, including adding site content and making money from the site. He also wants the free developer to pay 50% of future expenses (such as web-hosting) in return for a 50% split of potential revenue.

Getting someone else to develop his no traffic and dubious value names (which also adds good value to them) and even pay 50% of future costs is a fabulous business plan for HIM. However, he needs to seriously ask himself why in the world would anyone do that when they can develop their own names and get 100% of the site ownership and future revenue for themselves (or develop for others receivung up-front compensation for the job)?