When there's intellectual property involved, it's still acquisition. I would imagine some sort of consideration was offered in exchange for the IP associated with reMail, which makes it an acquisition instead of recruitment.
I think axod was using it as a euphemism -- effectively a lot of smaller talent acquisitions are hiring + vested bonus. That said, it seems a reasonable coup de grace if you've feel like you're ready to wind down a company and want to make the best of it.
Sometimes even if the product isn't itself of worth to the acquiring company, there may be value in removing that product from the potential acquisition market for competitors.
