You need to be transparent on how you are pushing transactions. Because I am not seeing any big bitcoin mining companies are coming for such services hence the chances for you by owning your own mining industry falls very low. I agree your action will talk louder and will get you more business still it is a basic right to know your process of pushing tx.

I guess using viabtc as a paid services also might be working effectively for you as people might not have time to accelerate at exact top of UTC times.