I would like to agree with the the s96822 position as he says, CISS is better than refilling cartridges because sometimes the cartridge can dry before new ink is added. CISS never allows the ink to run out. A C41 Canon cartridge easily costs 25 usd. I speak from experience" And quite frankly I disagree.
When we deal with a print head external to the cartridge as typified in Canon or Epsoms, printhead clogging has little to do with CSS or not. As long as printing is over the once per 3 months threshold, CSS or not makes no difference as long as the User does not ignore low ink warnings too long.
But unlike all Canons that use thermoelectric printing methods, Some Epsom printers likewise use thermo electric, but some Epsons use peizo electric instead. And in the latter case, they don't call Epsom printers clogmasters instead.
Th other reason for me to doubt the OP, is that the most frequent larger volume demand comes from the photo printing community, and since that community demands at least a 5 color inkjet, that foreign printer ain't ready to meet US demand.