Yes, it used to work most of the time for me but in recent days, my transactions are taking very less time so I don't go for it. However, one of my recent transactions is taking unusual time and even on viaBTC, the tool is showing 'submissions are beyond the limit' message so I guess it is something transaction backlog issue with the network or the portal included less fees with the transaction.
Is it really that difficult to browse through this thread for an answer to your question?
If you get the 'beyond limit' notification, it means that you are too late with submitting your transaction. You need to submit your transaction under the first minute of each hour.
After that first minute you will be shown the 'beyond limit' notification. It was first within 5 minutes, then 4, then 2, and now within the first minute.
Might as well just skip to the inevitable end; hit submit on ViaBTC under the first hundredth of the first picosecond of each hour.