I don't do much online shopping either, considering I work for a dept. store and living in a populated area I can find what I need nearby and avoid shipping.
I've been clicking away at Gain Mail and I'm ready to cash out for the second time. I've clicked enough to make $7 by "reading" emails. ($3 first cash out, now at $4). I used to get tons of email, then hardly any email and today had a ton again. I hope it keeps up becuase at 1/2 cent per click on many links it will take over a month to reach the $4 payout.
MyPoints is quick to ship rewards, although I've read plenty of members who have had trouble getting credit for shopping. I only shopped once, with TDS and had no problems receiving points.
My Milesource AwardMiles are growing, but I'm not ready to redeem. The link to see the available selection for the next amount I'll reach is not working. Once they email with the redemption certificate they have been quick to ship as well.
Quick Rewards doesn't have a minimum payout, but clicks/search links are only valid once per 24 hours. Unless you're online at the same time everyday you can miss out on points that can later be converted to cash (10/cent). I've cashed out twice, for about $5 total.
I was doing Tropical Mails (like Gain Mail) until this past week. When I joined there was a $10 signup bonus and payout was $45. The payout was reduced to $35 recently and I cashed out. about that same time a lot of links suddenly were for only 1/2 cent. They just paid 4 people who cashed out in June so I'm not expecting to see my redemption for a few months.

I refuse to click any further links. They send plenty of links everyday but I've lost my patience to wait 30 seconds for 60 emails (not to mention doing it for two sites!).
It took me 2 hours to go through my RP tonight, just clicking and "reading mail".