They could send 2 vouchers....one redeemable before game 5 and
the other after game 8....if you want to use both then you need
to stay a while.
I like the "free play" or voucher idea...the casinos
use it effectively. It is gambling, some people like to gamble
but need an "excuse" to justify going, either for themselves
or maybe their spouse. Give them a reason to get off the couch
and show up.