My Canon is, I think, the last model in its series where "compatibles" can be used. A friend who was impressed by mine bought a slightly later model, which has chips in the ink cartridges (for heaven's sake!). The printer rejects refilled cartridges, and we've not found a supplier of non-"genuine" ones. A set of cartridges costs more than the printer, so when the present lot run out, the printer goes in the skip and she's buying a colour laser (not a Canon, either!).
I've found a good supplier for compatibles for mine, and if anything they're better than the originals. I pay £3.95 each (the thing uses six) compared with a list price of something like £18 each for the "genuine" article. I can see why they wanted to put chips in!