Well, with MyPoints you only need to earn, on average, about 140 points per dollar of what you want to redeem for (example, 3500 points for a $25 webbie, which is 140 pts/$). But with LuckyPoints, you need closer to 920 on average, even more for Webbies (21250 points for a $20 webbie, which is closer to 1062 pts/$).
Yes, I have spreadsheets of this stuff.
Of course it's pretty easy to earn 50 points/day at LuckyPoints, if you get the trivia answer correct.