What ARE they though?
It seems odd that they only have a 50% weighting, yet "slots" have 100%. Surely a slot is a slot, so why the difference in treatment when it comes to WR.
When you DO get them, this will become important for players to understand, as well as to be able to identify when they are playing a "VIP slot" as opposed to merely a "slot".
It is also counter to normal logic that "VIP" in this context is NEGATIVE as far as the player is concerned. Logic would suggest that a "VIP" slot would have BETTER terms than a "regular" slot, but that it might be restricted to VIP players, who themselves would expect a "better deal" than that offered to regular players.
Currently, this suggests that becoming a VIP causes your WR requirement to DOUBLE, whereas at Jackpot Factory the WR is HALVED for a VIP player; down to 15xB from the standard 30x. At 32Red, VIP players benefit from ALL games counting at 100%, not just the slots.