I went to B.A.P official fan cafe website and I found you can join their fan club.
By the way, if you haven’t noticed the site is completely written in Korean.
That why I found this on their Official Facebook that can help join their fan cafe.
The website is http://cafe.daum.net/TS-ASIAN and the layout is different from what it use to be.
Don’t worry the step are the same. ^________^ So if you want to sign up to your favorite group (BAP), you can do it now!!!
Source: B.A.P Official Facebook