If I understand the protocol, the ASP does an on-chain transaction for every round. So I guess 5 seconds is fast enough for a payment to be quick on mobile, but slow enough to allow “plenty” of ASPs to operate. Every bit of time you shave is less blockspace available for ASPs.
Discussion
By on-chain you mean the ARK chain?
No. Every five seconds an ASP does a coin join round that results on a transaction on the Bitcoin blockchain.
But how? Wouldn’t that be tens of thousands of transactions every 10 min? And the costs would be astronomical