It's possible that the bonuses were part of a promotional campaign or a reward for specific actions taken by some members. However, without more information, it's difficult to determine the exact reason for the bonus drops.
As for why not all loyal and active members received the giveaway, it's possible that the promotion was only intended for a specific subset of members, or that the selection process was based on specific criteria, such as level of activity or tenure with the organization.
Stand.
There is a good chance of the dealer busting.
If you hit, YOU have big chances of busting because cards J, Q, K, 10 and 9 make you bust, Im not sure about this but I think its almost 39% chance of busting.