Please explain where you are reading this and to what printer model (s) it pertains to.
OK, I saw it.
That's a newbie that doesn't know what he's talking about. You have to be careful with customer comments at Newegg or anywhere else. You need a large sampling and you're looking for "trends".
One guy making a comment can steer you 180 degrees in the wrong direction.
MP530 and MP810 use CLI-8 carts which are refillable as well as resetable.
Stay away from the other printers in the ad if you want to refill.
Use the search function, this has been discussed ad nauseam here and elsewhere...