1. I'd normally say it is worth buying the Golden Membership and that was the first thing I bought too because you have the opportunity to win coins by participating the VIP Events, but that really depends on your skills and luck (depends on the type of event too). If you suck at events and you don't have the patience to become good at it, so maybe it's not for you. On the other hand, you can spin Luckyboxes and get shitty items, not to mention you have to be very lucky to win a Golden Ticket by spending only 300 coins.
2. As for the Activity Points: For every day you play actively in-game (minimum 3 hours) and gain some exp, you will get a free Lucky Box! The more days you play in a row, the higher the rewards:
Every day you will get a lucky box.
+ A cosmetic box every 3 days.
+ 1 AP Shield every 7 days.
+ 100 coins every 10 days.
You are also getting bonus EXP (+10% per day) up to +100% (after 10 days).
