You can buy chips but I really wouldn't if you just want the rewards you get enugh free ones everyday and they go up fast! What then means so do your reward points then you can buy things for paying nothing at all!!!
My friend told me about this and I'm glad she did I've been playing it nearly everyday since and I have quite a few reward points to use ( you can buy 3 things in one time) or one large thing it's up to you and I don't have tons to get a hotel room but I do have enugh to get a free buffet meal or a monorail pass for 2 days ext smaller things like that or a bit higher things like free entry somewhere to make your stay extra special without the cost. At the min I have 38,400 I think so that's enugh to get 3 things but I'm guna keep playing right till the last min to get the best things I can as they have to used or spent demanding on the offer mostly within 90 days so I'm going to work till the end.
You can get discounted things where you pay for the item but get like 50% off if you want something better but don't have quite the amount of rewards needed.