Which will be fine until they decide to adopt the same business model...
Yes, but in the same way, there were various workarounds, with the very over priced printer cartridge system.
With much cheaper clone replacement cartridges, alternative ink-refilling methods, replacement clone-chips (to the silly counter chips inside some cartridges, to try and prevent them from being refilled), and other solutions.
So, buying used older mice (possibly brand new, unused/unopened in sealed original box), before the possible introduction of subscription-mice. Repairing/maintaining the existing (non-subscription) mice, to keep them going.
Typically (in some cases), it can just need a button (new/renovated switch/contact), to renew it.
Open-hardware/source or cheaper, basic mice, without any need for subscriptions.
Then there could be hacking (where legal/ok) or repurposing the subscription mouse's hardware, with your own MCU/electronics.
You might (I don't know, if this will apply) even (like with YouTube subscriptions), be able to use a VPN, and pretend/subscribe from the cheapest possible country, to get the subscription costs, down to peanuts.
Also, the EU (and perhaps other jurisdictions), could be persuaded, to outlaw** such activities.
**But if they do, NOT like they have with the internet cookies, otherwise, every time you move the mouse a pop-up will say, do you want a subscription or not, and you have to constantly close those annoying pop-ups, like with the current internet situation. (I know there are possible solutions/work-arounds, with things that fix it, but I've not been happy enough with any solutions so far, to use them).