Good post in an area still not fully understood.
Questions:
1- i have been mining for a while and have gotten several "found a block" notices on steemstats.
Does that mean I will be rewarded?

2- I have 2 separate machines mining on different accounts with about 21k hash power on each one.
What would be more proffitable, to run 2 21k boxes, or running 1 42k box?

3- How often are the mining rewards distributed?

Thanks for your answers.