Ann: NST: Northern Star Acquires Control of Echo, page-7

If it gets that close to 90% they will let the offer lapse and sort out a better offer with the remaining shareholders after 6 months to avoid paying out all those that have accepted.

If the nos stay where there are there is a good chance they may increase their offer by the next extension period. Best to wait unless you desperate for your money. Doubt another bidder will come in now with NST gaining control hence why acceptances are rolling in.