A few thoughts:
1) I did the original goldpoints/ valuemags thing. It took time and many calls, but the miles did go through, and I have no reason to complain about tons of miles for little $$$.
2) With items through LL Bean at $1.25, it's worth it to spend a half hour a day, buy those items, donate them, and earn miles.
3) I wouldn't regergiate the $5 gift certificates.