"As a Member of e-Miles®, you earn Continental Airlines OnePass® miles — simply for responding to marketing messages tailored to your interests!"

I admit I'm a sucker for online surveys (just a few more and I'll have enough points on one site for a waffle iron! Score!), which probably means I have too much time on my hands.

I've been playing around with the e-Rewards program, where you take surveys and sign up for crap for pennies, and when you accumulate $25 can trade'em in for 500 OP miles. This new program gives you miles, and transfers them directly to your account in 500 mile chunks on a quarterly basis.

1) What's with all the gimmicky survey things?
2) How much hassle do y'all think this is going to be to actually get the paltry number of miles that accumulate?
3) Has anyone ever earned a substantial number of miles through this type of thing?