It's a tech PR Catch-22: A privately owned startup hires an agency to position it for acquisition.

But when acquisition occurs, it is often the end of the agency's work on the account.

"In the economy we're in, it's just an M&A period," says Sabrina Horn, president and CEO of the Horn Group. As an "insurance policy" of sorts, she adds, agencies - especially small and midsize - have to "protect themselves so that they're not exposed and suffer when [an account] ...