Cheapest way to achieve this promo?

earn 500 points for $15 free slot play.

slots: $1 coin-in = 1 point
vp: $2 coin-in = 1 point
e-Craps ($5min, 3/4/5x odds): $4 coin-in (odds included) = 1 point

so $1000 coin-in for vp and $2000 coin-in for craps.

best vp game is 9/5 JoB at $25 denom. at $5 denom, it's 8/5 JoB. :(
so e-Craps seems like the best bet.

And with e-Craps, I can take up 2 terminals with 2 different rewards cards (mine + a friends).
one card plays passline and the other card Don't pass.

is playing both pass + don't pass the cheapest way of achieving this promo?

Is it recurring or one time? The Doey-Don't would have the least Variance, but you might attract some unwanted attention. Definitely not worth the risk. All in all, it's a really weak promo and I don't even know that I'd bother with it.

So I don't know if it's even worth the time it would take to play it

Quote: 100xOdds

is playing both pass + don't pass the cheapest way of achieving this promo?

No. Playing just the Don't with full odds would be cheaper. 0.0136 is less than 0.0141