If I were leasing a device, ads might be acceptable. If I own a device, then ads are absolutely not acceptable. If the supplier is not making enough profit from the sale of the device and feels they need to sell advertising, then they should just increase the price, rather than sell space on a device they do not own.

A game console purchase is not a partnership, it's an I-own-this-device-so-you-fuck-right-off.