US is world's biggest market and home to most big tech companies. It has a two party system. Do you suggest that the majority of people will select which of the two parties to vote for, based on their stance on subsriptions? Or that it's possible to force one of the two parties to take a strong position against subscriptions?

Of course not. Culture war bullshit will keep them distracted.

On second- and third-tier issues, politicians take their cues from friendly activists and interest groups, for whatever "friendly" means to that particular elected. Think about how many politicians' reelection messages are basically bullet-points of small-bore asks delivered. Each individual item may not win many votes, exactly, but they create a general sense that the candidate is engaged and effective. And perhaps more importantly, it's hard for potential opponents to build support when the incumbent is delivering for the most engaged voters in the district. Anyways a politician needs to do something while in office; it might as well be the stuff that people they respect want.

So: you frame this issue, and how it's confluent with the broader [Democratic/Republican] outlook. You clarify the desired legislative outcome. You show some public support, which takes many fewer people than you might think, and set up some meetings. Hopefully you find a sponsor. Then repeat as necessary to get the bill introduced, voted on, and maybe even passed.

None of this is easy; it's a ton of work, and by no means guaranteed of success. It's especially difficult in today's US where so much gets bottled up behind partisan showboating. But it also happens all the time. See the traction the right-to-repair movement is getting.

Really it's the same for "voting with your wallet" - to actually vote with your wallet, you need to start a competing company that offers the service that you want.

In actual practice, as here, ‘vote with your wallet’ stands in for “people are choosing this, nothing to be done.” And ‘voting’ stands for collective action to change the choices on offer.

But sure, starting a company’s great too. Though with concentrated markets and high barriers to entry, that won’t always be feasible: I wouldn’t want to start a printer company, and that’s probably not the worst case.

Nobody is saying that, though. Time is money, and if your printer is bricking itself because you forgot to update your credit card information, that will be wasted time, and you'll remember that when it comes time to pick a printer vendor in the future.