Spark is NOT bitcoin.

It's a state chain connected to Lightning.

There is no unilateral exit [to bitcoin].

Any value with Spark is censorable.

The founder of Spark is behind Diem/Libra (Facebook cash), and previously worked at Coinbase, Facebook, and PayPal.

Spark is supported by a16z, Jack Dorsey, and a bunch of other hedge funds and VC's.