Most aquihires are "take it" or "you're all unemployed." Since some money > no money the aquihire is inherently a benefit to the employee. You still have the option of not taking it and being unemployed. Or taking it and then looking for a new job. But you have more options and more income than if it didn't happen.

An acquihire is also a solid opportunity to end your participation on the team. It's perfectly acceptable to stop working somewhere after only a month because the company got acquired. For similar reasons if the acquiring company presents you with a contract (I think there was an article about this, a noncompete?) they want you to sign as a condition of continued employment, it's very different than if they presented you with that contract as a condition of hiring you normally.