secondstrade.com raised payout rate and changed  the rule like below.

★★★ Only Signature Rate ★★★
4.  Full Member :  0.0006 BTC per constructive post.             - payout increased as of 02/02  
5.  Senior :          0.0006 BTC per constructive post.                     - payout increased as of 02/02
6.  Hero / Legendary : 0.0007 BTC per constructive post.      - payout increased as of 02/02            
7.  No limited.

★★★ Signature + Personal message  Rate ★★★
4.  Full Member :  0.000625 BTC per constructive post.            - payout increased as of 02/02
5.  Senior :          0.000625 BTC per constructive post.              - payout increased as of 02/02
6.  Hero / Legendary : 0.000725 BTC per constructive post.        - payout increased as of 02/02
7.  No limited.
8.  MAX 0.35BTC/week.                 - added as of 02/02


★★★ Terms ★★★
1. 20 posts Min per week - no roll over, only first week roll over
2. 100 Posts max per week - no roll over

sig camp thread : https://bitcointalk.org/index.php?topic=907271