As far as I know, this is true. The new printers are only compatible with MakerBot Filament. You can't blame them. Look at 2D printing. All 2D printers are only compatible with certain ink cartridges. This is one of the main ways 2D Printers prices came down from $1000 all the way down to $100+. I expect the same thing to happen in the 3D printing industry. 3D printer manufacturers like Makerbot can take a loss on the sale of their printers because they know they will make it back in filament sales, and perhaps even digital design sales.