I emailed the marketplace support on September 25th with 4.9 updates for two of my assets. I again emailed on Oct 9th three separate emails for three of my assets (two of which I already sent in September) with 4.9 updates. I have received emails, YouTube comments, and marketplace comments asking for 4.9 updates. I have emailed again today 2 weeks after my last emails. I most surely hope I have not had any refunds approved for non compatibility. The marketplace still shows non 4.9 compatibility which of course certainly means 2-3 weeks loss of sales.
I hope the marketplace support is more serious once 4.10 comes along.