these numbers can and will change all the time.  that's just a snapshot of what would happen if you bought the coins right now and all variables stay the same for 1 year.  not gonna happen in crypto.  most coins will be way up or way down in 1 year.  also, more masternodes are coming online, which will lower the ROI%.  and you can't buy the coins all at once; the exchange has such low liquidity that you would drive the price up.  and you have the choice of hodling, trading, or dumping.

i recently started one, it's getting maybe 12 coins/day so far