The $5 AGC are a better value than the $25 and $50 cards. They cost 90SB/$1, while $25 is 126 SB/$1 and $50 is 118 SB/$1.
Surplus/Carry Over is how we redeem so quickly. Myself, I started in January and did several high paying offers and tasks in addition to SBTV, dailies, games and search wins. I had 5000 SB by the end of the month, I've been riding that surplus since and try to replenish that balance each month so I can cash in right away.
I aim to earn 110 SB each day from SBTV, dailies, games and search wins.
I have one searching referral so that's an extra 20 SB/day.
I'm not very good at finding Swag codes but maybe 20 SB/week.
I give a shot at the trusted survey (and complain if they don't credit) 100 - 200 SB/week
Special Offers 50 SB/week (videos/facebook apps/surveys)
Tasks (don't do them anymore because MTurk pays better)
The amount of swagbucks that people earned use to blow my mind when I first started. Check out Swagbucks 101 pdf on page 2 of this forum (I haven't updated it with new amazon rules or paypal and home depot info yet)
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I got one of my .com's GC that I want to trade for .ca (I'll have a total of 5 to trade once they all post). Edit: traded and next 4 spoken for