For anyone looking for information. You can calculate your own rakeback pretty easily for VIP once you have the information.
VIP + Points Exchange + Bonus + Rake Chase + Other Promos
VIP is pretty simple. For the first $150 you get nothing, for $150 - $750 you get white (15%), etc. Every month after that you will get whatever you ended up raking for the previous month.
http://lockpoker.eu/vip/
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VIP Points Exchange is also rather easily calculated when you know what you are looking at. I believe points are accumulated at the following rates (Someone check me on tournaments);
6-Max = ~5pts / $1 Raked = 7% Effective Rakeback
FR and Tournaments = ~7pts / $1 Raked = 10% Effective Rakeback
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Bonuses are calculated off of what game you play because you gain points at that rate. You need 84 points to clear $5 of the bonus.
6-Max = ~30% Effective Rakeback
FR and Tournaments = ~40% Effective Rakeback
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Rake Chases change from month to month but they have generally held the same rake% over the long haul. Keep in mind that unless you rake a lot very quickly at the beginning of the month you will not get all the prize levels and you are likely to not get a lot of the prizes you will have raked for by the end of the month due to the limited prizes.
The Big Chase = ~17% Effective Rakeback
Double Agent = ~17% Effective Rakeback
*Keep in mind playing at Double Agent tables will rake for both Double Agent and the Big Chase so you get 34% Effective Rakeback there.
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Other promos like lock lotto, double VIP points, etc. are harder to calculate and are generally very small amounts regardless. But they can add a couple points to your bottom line.
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So the maximum one could rake via the VIP program is if someone were a FR Player and played exclusively at Double Agent tables. They would have to have a bonus and hit all the levels of the rake chase per their rake. Finally they would have to be a Black VIP Elite.
This would net someone ~129% effective Rakeback not counting other promotions.