No, anyone can buy, but they've closed PO already from bambaland on Ambush. You don't have to be 3AA members to buy from there thou sometimes they do have exclusives for 3AA items only. Generally 3AA members will have 24 hours period to buy when they are items on PO.

... A queue will be formed near the downstairs event entrance on the night of Friday 27 April, at 7:00 pm. To enter the queue, you must be ages 15 – 60.

A purchase pass (which is an order form) will be issued to customers. Each person is only entitled to one order form. Anyone caught jumping queue will be sent to the back of the line.

Sale will start on Saturday, 28 April at 10:00 am. Each toy is available on a first come, first serve basis until sold out.

Limited purchase of one (1) of each available figure per person.

You must pay immediately in cash (only HKD accepted) upon reaching the front of the queue and placing your order.

Full set of Re-Venture rules and guidelines is available here.

Please see the direction how to form the line bellow (based on who got to form the line first, second, third and etc.) and the image is clickable , so you can see full resolution image after the jump.
[taken from 3A blog]

See you in the HK newspaper! No 1...

Mother of....

hrm. dono wn buy black or white? or both? lolx

Black and White...

vailable only from BAMBALAND on the 30th of APRIl, 9-00am Hong Kong time! $120usd ( price includes worldwide shipping )

from 3A FB photo
The q is forming up at 3 pm!

Actually was 10 am la. Hahaha

TQ ~ v nice~

Bro cool and well done... any fb of them... both like twin...