Yes, CIS is quite popular in Asia where inkjets aren't as prone to nozzle clogging but toner-based printers suffer from the more humid climate.
Buying generic ink in bulk quantities is also much cheaper than individual cartridges (you can buy a whole LITRE of ink for the price of an original cartridge for some printers), and you can even dilute it a significant amount if you don't mind slightly reduced saturation - I've run 10:1 black dilution in my CIS and the output looks only very slightly greyish.
Some printers have EEPROMs on the cartridges to deter refilling/CIS systems but the Chinese have produced "modchips", self-resetting cartridges, etc. to get around this; some can even reflash the firmware, presumably with one that has all the checks patched out.
Buying generic ink in bulk quantities is also much cheaper than individual cartridges (you can buy a whole LITRE of ink for the price of an original cartridge for some printers), and you can even dilute it a significant amount if you don't mind slightly reduced saturation - I've run 10:1 black dilution in my CIS and the output looks only very slightly greyish.
Some printers have EEPROMs on the cartridges to deter refilling/CIS systems but the Chinese have produced "modchips", self-resetting cartridges, etc. to get around this; some can even reflash the firmware, presumably with one that has all the checks patched out.