Step 1 went fine. Step 2 hung at "Please wait until the transaction to ends! Dont't close this window!" (typo in the "Dont't). I went back and looked at the second transaction and it failed without a reason provided:
https://rinkeby.etherscan.io/tx/0x58c5d946584e69371abab85758cdf5d8e4318595332cddf76fc50b1e1dd5b50cThe one thing I had to do that deviated from the instructions was that when Metamask popped up during Step 2, it gave an error due to a dangerously high gas limit. I had to modify that limit to 90000 (matching the instruction screen shot).
Let me know what other information you would like to help debug.
Edit: It could be I tried to pay despite not having any Satoshi in the wallet, just the 0.1 ETH. I'll follow those steps now.