I noticed it too, i talked about it on our local board too. I'm trying like 2 days in a row without success so i end up cancel my first transaction then push it with higher fee good thing i used electrum.
They are still accelerating 100 transactions per hour freely.
The problem is that ordinal scammers are abusing ViaBTC free accelerator with their bots and don't allow humans to submit their transactions.
They become overboard, they are one of the reasons why the network become so congested and now this too. Shit.
But talking about bots, so they can bypass the captcha on viabtc.