This would imply that the very event of being in a team that is acqui-hired should communicate that you are more effective than the norm compared to your cost and that you can therefore either negotiate higher pay at the acquiring company or you could bring to status to the table in salary negotiations for a new job.
FWIW, I don't think acqui-hiring is only about getting a team that is relatively cheap for their output. Regular hiring processes are also not cheap and by buying an entire company you can "hire" several devs in one shot (and at a lower risk) where it might otherwise take much more time to find that much extra capacity.
You also get the benefit of hiring several devs that already trust one another and have experience working together without stepping on each other's toes. That's where you can look at the product they have already developed and for what effort, and with some diligence, hire the teams that aren't dysfunctional. Or at least that's the idea.
FWIW, I don't think acqui-hiring is only about getting a team that is relatively cheap for their output. Regular hiring processes are also not cheap and by buying an entire company you can "hire" several devs in one shot (and at a lower risk) where it might otherwise take much more time to find that much extra capacity.