The best way to improve the ad experience is to not have it. And if you propose for me to pay you for the hardware, you'd damn well better not have an ad experience at all.
I get it. The business model never made any sense. You get a one time infusion of cash when you sell a device but you have an ongoing expense of providing the back end computation for who knows how long. Amazon expected that cash to come from impulse buys. That didn't happen. Something has to replace it. But to seize control of something people bought and own to force feed ads that benefit no one but you and annoy your users is not it. Kinda glad I ditched Alexa.