Thank you @buzz.lightyear for your nice words.

Coins and Shares, both are virtual in-game currencies. We use "Shares system" to track how much you've earned and in order to give you the ability to request your payout whenever you want, we had to use shares system. That way, you can accumulate shares as much as you want and request the payout weekly/bi-weekly/monthly or whenever you want.

When you send us the request of converting shares, we manually verify the gaming activity for possible exploits/pirated version/fake identity or any other abuse. If there's no such abuse, we include your name in the "eligible for payout" list and make a public post on STEEM blockchain with @super8ballclub account.

As stated above, we use a beneficiary system. After your request is approved, we create winner posts on STEEM blockchain and vote from our official account to distribute the prize through a beneficiary system and you get your rewards in SP that will automatically be delivered to your STEEM wallet.

So in short, the reward still comes from voting activity. No one directly trades shares for STEEM. They just request the conversion to get their names included in our winners vote list and get the share of their prize from our reward pool.