Hi,
1. You should consider to increase rewards for signature campaign. If we compare twitter rewards and signature it is big difference - signature always have much higher rewards. Reward for Senior Member with price 1 ETH = 4667 WRL is only $14 per week. With such conditions you will not attract active and high rank users. In other campaigns, Senior Member and above easily can earn $200 and more in tokens per week.
2. Spreadsheet with participants list? To check if someone is accepted, or maybe you accept everyone, even users with red trust?