So HP started by deciding to breach the contract that the printers were originally sold under. That was never going to end well.
Now they've backtracked, they've shot themselves in the foot a second time: nobody will switch to a paid-for tariff because they wouldn't be able to move back.
I guess their marketing department has been taken over by a competitor.
And for some of the others commenters here, no it does not print advertisments. and yes, fifteen pages a month is very useful.
Cleaning the heads isn't going to to change:the heads are part of the cartridge, changed for free when the ink runs down.
I've been using one of these printers for a few years. It is mostly used when I'm away in my motorhome, or for when I want a quick one-page document printed.
Ivee never needed toa print as many as fifteen pages in one month: the problem is remembering to print something at least once a month to keep it clear. If it have a big print run I use the big laser printer.