OK. I modified my post a little. Tooltip shows the highest input in priority, not average.
I will try to make a simple explanation.
As you may know. There is one block generated in every 30 seconds. All open wallets with all aged inputs in them are rolling for that next block. Its kind of like lottery. There are many tickets, but only few winners in each block. There are two variables.
First variable is amount. Large inputs have more tickets and small inputs have less tickets for each block.
Second variable is time. Older inputs have more tickets and newer inputs have less tickets for each block.
Each time block is found, there are parameters which determine the block size. This doesnt matter atm. Lets just say that only half of the current coins can be winners for this block.
So half of all the tickets are drawn randomly. This is why tooltip is never completely accurate. It calculates the odds, not the certain case.
The more tickets your input has, the bigger change it has to generate mint. If it does not get lucky for this block, it will have even more tickets for the next block and so on.
When your input finally is chosen for block, you will get your mint payment. Your input is sent to your own address and your interest coins get added to it. This resets your input age, so it can start aging again.
Hopefully this helps.
Yes, they told that same about WhiteCoin
I dont know what happened to whitecoin. I did give a little look at its source. So all i know is that its direct clone of Mintcoin older source code.