Hey guys,
Sabu has nothing with Lightning at all.
It looks you do not know how lightning works, neither how Sabu works!
As a short answer in lightning both parties(sender & receiver) have to open channel and put the fund in a multi-sig account, but in Sabu no one has to replace its fund. The iuuser just creates a valid transaction and deliver it to creditor. Indeed in 99.99% of time they do not need to record their money transfer on Bitcoin blockchain!
Please! read this post first.
https://raymo-49157.medium.com/time-to-boost-bitcoin-circulation-million-transactions-per-second-and-privacy-1eef8568d180

I am humbly looking forward to your conscious critique and helps about Sabu.