It probably depends on how you prefer to stack sats. Not many places you can buy bitcoin support Spark. But a good number support lightning and this can be a good way to gain a bit of privacy from your source of sats. So perhaps in the future Spark serves a similar role. 

But I think you are right that it's most useful at the moment for payments with a low barrier to entry. 


Scoresby

lightning

What the heck is Spark?

Thank you very much for this good explanation, for what I can understand there is the risk of against part, and you have to trust a third party. (I don't think it is useful).

Seen from a corporate perspective, for someone who moves large amounts of money among commercial partners it is something useful. (It sounds very good, that of moving large sums without paying a lot of commission and immediately) 

But for a common user like me, who only seeks to survive independently and stack some Sats in that process, I do not seem optimal to trust a third party.