Where is eCash used?

Could you please elaborate on the usage scenarios of eCash? I'm particularly interested in understanding where it's commonly utilized and the types of transactions it facilitates. Could it be used for online purchases, peer-to-peer transactions, or perhaps even cross-border payments? I'm also curious to know if there are any specific industries or sectors where eCash finds its most significant applications. Could you provide some examples or scenarios where eCash is being utilized effectively? Thank you for your insights.