Gamesgrid 1000% +EV for them?

[cwes]

I am used to rejecting offers that sound too good.

That 1000% bonus sounds a little too good to just reject it, so I thought twice about it.

You need 5 FPPs to earn $1. Let's have a look at the worst case scenario for them:

10-player table, minimum rake generated for each of the following fractions of an FPP:
0.25 FPP ~ $0.5 rake: They have to pay 10 * (0.25 FPP) * ($1/5FPP) = $0.50, hence they break even
0.50 FPP ~ $1.0 rake: They have to pay 10 * (0.50 FPP) * ($1/5FPP) = $1.00, hence they break even
0.75 FPP ~ $2.0 rake: They have to pay 10 * (0.75 FPP) * ($1/5FPP) = $1.50, hence they earn $0.50
1.00 FPP ~ $3.0 rake: They have to pay 10 * (1.00 FPP) * ($1/5FPP) = $2, hence they earn $1.00

Now considering that pots will be raked higher than the minimum needed for an FPP fraction on average and that they will have interest on the deposits, this offer sounds legitimate to me.

Am I missing some point? I wouldn't like to put $500 into some pyramid scheme.

Thanks for your input.