Damn. I am always too late for those promotions. Congrats to the winners.maybe they can mail the users more about promotions
I receive an email for all changes in Bitsler. promotions also. You can follow this thread, promotions are announced here and all other changes or improvements.
Make it simple, just enable notification for this thread from upper right and you will be notified. Bitcointalk will send you mail when someone will reply on this thread. And obviously Bitsler will update this thread if there is any such as promotions. So you will not miss any promotion or updates.