I recently had a longtime member ask if CashDuck was going to become an instant payout site. CashDuck has never offered instant payouts although in the past there have been differences between cash and gift card payout speeds. The basic reason is that I don't get paid by the advertisers until the end of the month after the month in which you completed the offer. So all of the activity from October offers will be paid to me at the end of November, when I will turn around and pay it out to you. The longer reason is that some of what's going on in that period of time is that the advertisers are reviewing the leads, especially for trial offers, and checking for any bad addresses, fraudulent credit cards, etc. Now this is not a significant problem for CashDuck, although we have been hit by fraudulent users in the past. But a good portion of the reason that CashDuck doesn't have a lot of problem with fraud is because if someone intends to sign up for offers with stolen credit cards, this will be found out before they get paid and they won't get paid for those offers. If you have an instant payout site, it not only means that you can't avoid paying the fraudulent users, but also that people who intend to use bad credit cards and bad addresses will actually seek out your site and do offers there much more often. To avoid losing lots of money, you end up paying everyone less, since you're taking on a lot of risk that you'll lose money on the bad seeds. And this kind of carries over even to freebie offers like surveys, where you're almost never going to get a reversal. This is why most of the bigger GPT sites are still on the monthly payout system.
A few examples of how much less instant-payout sites have to pay (these are all prices from one particular site that I know of.) Most of their offers are in about the same proportion to what I pay out, these are just a few that we are both running.
ID Promise (30 day trial, $1 cost): CashDuck - $11.50 and 5 feathers, Other - $4.55
Identity Guard (30 day free trial): CashDuck: $14.00 and 5 feathers, Other - $5.95
eFax (30 day free trial): CashDuck - $9.00 and 3 feathers, Other - $3.15
Quiz Jungle - Spongebob: CashDuck - $0.70 and 1 feather, Other: $0.30
Daily Survey - Absolute Rewards: CashDuck - $0.40 and 1 feather, Other: $0.18