At this point, the WVO community is shrinking because of a few factors. One, big business is buying the grease. When it was "free", the restruants were paying companies to get rid of it. Now, the same places are making money by selling it. Second, the electric car or hybrids are coming out and replacing conventional gas cars to some degree. Why go thru the hassle of WVO when you can drive a COTs car on the cheaps so to speak. Also, when the price of fuel dropped - stabilized, so did the interests in biodiesel/WVO. Last, burning grease successfully is not that easy when you start. One is looking at $1,000 start up costs. Picking up a waste product which is messy and turning it into a water free, junk free, purified product down to the sub-micron level takes time, patience, practice, and money. Most folks get cranky when they run it thru a few 1 micron nominal bags, pour that crap into the tank, and expect things to go just jim dandy. The car itself will need around $500+ to be properly converted. And, because there are no guildlines or established "norms", everything is R&D. Heck, I am on my third system right now, and my guess is that 1-2 years from now, I will change my set up again since I will think I built a better mouse trap. All these factors equal time and money. So, tell someone that they will need to invest around $2,000, about a few hundred hours, and maybe an hour or two every month from now on to collect grease, and see how many folks line up. Everyone likes the idea of free or nearly free fuel and driving, and WVO does present that opportunity, but there is a start-up price tag. Most folks will stay away from the process or, they jump into it with both feet, only to be disappointed or bitter over a poorly running car, or the nickle and dime costs along the way. Just my .02 cents...