TrueDoc performs the same function as a FAX machine. The difference is that TrueDoc rasterizes at the receiver instead of the sender, allowing the use of the best possible resolution. Not the same. The legal use of a font is to publish a document.
Publishing inherently entails imaging the font.
TrueDoc only delays the time at which the final imaging is done. Sure, if you play by the rules. Bitstream says it's OK to distribute the TrueDoc font resource ONLY in conjunction with an associated document to be imaged on the client system. A licensed developer can distribute TrueDoc font files. The font files may only be used to render the document they are associated with.