Does it Pay? No, it doesn't. Cash Slots is not giving away real prizes, so you won't get paid even if you meet the conditions. It's important to mention the developer's goal is to hook the player on the game for as long as possible.
If you are here for the game, Cash Slots may not satisfy you. It's better that you choose other similar slot-themed games on Google Play. If you are here for potential earning, you can forget about it completely. It's not going to materialize.