I don't get you. It uses refillable ink tanks, right? Why would they be over-full, and why would the manufacturer care? How could they ever detect third-party ink?
My assumption was that they were charging more for the printer and being 'permissive' regarding ink (that is to say, allowing the customer to do what they want with equipment they own).
They look like they're somewhat high maintenance. [0][1]
> Epson uses an "inkpad" to clear its printer (jets?) before printing. Eventually the amount of ink deposited in this blotter-type system fills and must be replaced. Unfortunately it seems as if replacing the inkpad is very messy and difficult. Our printer is used so frequently that the inkpad needs to be replaced every six months.
> Epson charges enough to make replacing the entire unit a (sadly) reasonable option.
https://www.ifixit.com/Answers/View/429699/Epson+ECO+TANK+%2...
> Epson uses an "inkpad" to clear its printer (jets?) before printing. Eventually the amount of ink deposited in this blotter-type system fills and must be replaced. Unfortunately it seems as if replacing the inkpad is very messy and difficult. Our printer is used so frequently that the inkpad needs to be replaced every six months.
> Epson charges enough to make replacing the entire unit a (sadly) reasonable option.
https://www.ifixit.com/Answers/View/498327/ink+pad+finished+...
> As suggested in the video after cleaning the waste ink pads you need to reset the counters.
> Go online and search for Epson XP-620 reset waste ink counters to find results for suppliers of the reset software which you can purchase online