Return Path acquires OtherInbox

This morning Return Path announced they have acquired OtherInbox.
OtherInbox is a service that allows subscribers to create tagged email addresses and organize incoming mail. Acquiring OIB gives Return Path access to recipient behaviour that only the ISPs had previously.
According to the press release, Return Path will be using engagement data from OIB as another factor for Return Path Certification. I think this can only improve the scoring and reflect a more modern measure of wanted mail.
Congratulations to Return Path and OtherInbox.