I don't think its bootleg, its pack in a nice box at least and it have title licenses.
Meanwhile, if anime need to get licenses to sell in NA, they also need to do so in Hong kong and taiwan and rest of china.
The chinese market for anime is 10 no... 100 times...maybe even 1000 times bigger then what the North american market gives.
If you are a smart business man, which market would you go? a small anime market or a big anime market?
And of course, chinese subtitle is a must and most likely chinese voice audio (as these get broadcast on daily TV.... not just anime special channel..i am talking about DAILY general TV...)
As a chinese, i can say i start watching anime since 3? ... I even saw the original SDF on hong kong daily TV...