It doesn't make much sense to rely on this accelerator because the pressure on it is huge, whether it's bots or legitimate users of which there are probably thousands considering that everyone knows that this is the only free solution. In addition, Via pool has been finding very few blocks in recent days, and this continues today with
only 2 blocks so far.ViaBTC mined only 8 blocks in the last 24 hours but I doubt it has anything to do with the free acceleration.
I am not relying on the accelerator and it used to take a couple of minutes at least for 100 humans to fill up the slots even when the traffic was at its high unless it was secured by bots that is the concern here.
That's called a competition, many many many people want their transactions to be confirmed, so the one who submit the TX ID not only yourself.
As mentioned above it takes atleast few minutes, so this isn't actually due to people submitting their transactions to be accelerated.
I'm just hoping the other miners want to offer free accelerator service instead of picking transactions that willing to overpaid fees.
Not really, no one like to give freebies and viabtc does it so that they can advertise their paid acceleration service to more users.
Due to ordinal inscriptions, you need to be careful before create a transaction with low fees since we don't know when those people want to spam the network and make the fees suddenly went up.
Using RBF is always an option to tackle the sudden spike in the fee but Viabtc has been useful for making TX with less than 500 bytes and not really in any hurry over paying $20-$40 in the fees.