Miners cannot just pick a transaction and boost it. Mining happens per block. 1,2,3,4 .... etc. When the block holding that transaction is confirmed you will recieve your payment. Depending on the coin and if there is a time the said coin has to mature!
You cannot be like I want to mine trx hash 929342983xxxxxxxxxxxxxx it does not work like that.
exactly - I think the OP did not realize that and jrc209 was just trying to take advantage of it - who knows, maybe he did con the guy out of the $5