Sorry for asking this but that accelarator really works or not ? that viabtc too ?
Based on my experience on that tool its really works but sometimes viabtc need more time to get a another block.
You can check their website to get more information about that tool.
Normally the tool works pretty good, but they are only looking to get one confirmation for you, until you get more than one confirmation, it could take some time then (I once waited 4h before 2. confirmation and the buyer wanted to wait for 3 confirmations)