Victoria

Hardware subscriptions already exist in the form of HP Instant Ink and similar programs. Now you can continue to pay for your printer, but never get to own any of it, how great!

You don’t want hardware subscriptions. You should own the things you buy.

Generally, no. Apt gets its packages from the repositories, so unless (i) your .deb package gets added to those repositories, or (ii) you add a new repository that contains your package, it won’t be updated.