You can do these every thirty days.

I did not realize they were good for 90 days...these are awesome....I use them every few months! Nice to pay for them and then have the voucher like extra money when you get there! Below is the link and you can buy both as the same purchase and then print out the vouchers seperately.

https://slotplaycoupons.com/friends.php?refkey=TzwSzxH4