Hi Tony,
I realize we are in conjecture mode here, but let's continue a bit
further with this.
The advantage for the company I could see to doing what you state is
that they save the cost of the chip on the initial cartridges, which
they aren't directly selling (its a starter cartridge included on
purchase), also it will have a different "end of life" point that the
full ones sold for replacement, and it could make that cartridge
unusable upon refill, since it lacks the chip. So that could save the
cost of the chip in this cheapo first cartridge which is only good for
1/2 or 1/3rd of the standard cartridge life.
But, lets look at a reason why they might have a cartridge with a chip
in a printer that doesn't require it.
What if the original earlier model was unchipped. Then a later model
was introduced which required a chip, but both models could use the same
cartridge type. When used in the unchipped earlier model, the chip
would be ignored completely, not written to, not read. In the newer
model, the chip could be read and written to.
Two scenarios.
Art
If you are interested in issues surrounding e-waste,
I invite you to enter the discussion at my blog:
http://e-trashtalk.spaces.live.com/