Brother printer subscription cartridge?

Hi, I just bought a Brother HL-L2400DWE A4 laserprinter after the debacle with my HP printer... Now I see that there is a cartridge delivered with a pamphlet on it saying that I can activate my ecopro subscription.

I want to stay far away from subscriptions and just want to put house-hold brand cartridges in this printer with no funny business of blocked cartridges or anything like that.

Or can I really 'try-out' this subscription and once Im done with it move over to my house-hold brands? Or are they luring me in like HP does?