I commented on the post but will post it here as well;

I had a similar thing with @apress a few years ago, I set up an automated twitter feed to post the daily book deal to a twitter account, a couple of months afterwards I checked and realized @apress was just given to Apress without any email or notice (everything I posted too was lost)

Fair play to apress I contacted them and they got back to me within half an hour, they had no idea twitter hadn’t contacted me they were just given the account and they apologised to me..

I very much doubt its the TB more likely to be the TB search, marketing or social media agency who want to control the brand rather than embrace and engage (ironic eh) infact I’d doubt that TB is fully aware of what has happened (until they get into the office on monday morning and see the hundreds of @ replies they've had)