I found something weird on ViaBTC free acceleration. I was checking it and found 19 remaining hourly free tx. Out of curiosity, I tried with a pending tx from the mempool; it says submissions are beyond the limit. After a few refreshing, the remaining hourly free acceleration remains at 19 LOL.
I think it's a visual bug. I think I saw the same thing probably yesterday, but it cleared off after one hourAs for the free transaction slots. I saw support responding to some users who were having the same concern. The support told them that the 100 slots get taken up with in 4 seconds lately, which means someone or some people are using bots.