What he's saying is: Anyone can add Metadata in
blockcypher.
Look at your
transaction, I added a metadata saying
"01-09 Transaction is now receiving Confirmations.---bitcointalk-example".
There is something questionable with some Tx Accelerator Services, some are legit some are scam.
Some are just copy-pasting the Transaction id in the blockexplorer then labeling it "
Transaction Acceleration Service".
Perhaps, someone must find a way to look for legit ones.
Anyways, 20sat/byte is good for 1-day transaction about a month ago.
I even used 10sat/Byte and only took 2days to get confirmed last December 1st week.
Maybe, keep away from blockchain.info wallet? Someone's telling me that it is not recommended.