3- BadBear confirmed years ago I have no unknown alts, which you choose to ignore.
If you're referring to this post then you're the one choosing to ignore some important aspects of it:
https://bitcointalk.org/index.php?topic=1171059.msg12358580#msg12358580Quickseller doesn't have any notable alts that I know of (besides the ones he has owned up to), but it wouldn't be terribly difficult to hide it if you know what you're doing.
Besides you've had many suspected alts surface after that statement was made so it doesn't mean anything today.