creating an escrow used about 8 RC, and sending a decision around 5 RC.
Every VSC contract call will have a floor cost of 100 RC regardless of gas used and transaction status.
There are plans for calling contracts directly on VSC Blocks frontend as well. The terminal looks really nice though, other than the missing HiveAuth and Ledger icons which I probably need to look into.
RE: [updated] Ōkinoko Escrow – Trust Made Simple on VSC (incl. new Smart Contract Web Interface)