I just noticed that freebitco.in does offer a way to increase your free BTC rewards by up to a higher amount if the user play their multiply BTC dice or buy the site lottery tickets, I do try to roll quite a number of rolls but I doesn't see my free BTC payout amount increasing, is there a certain amount we must wager before the rewards get increase in the free roll?
i believe there are 2 threshholds you need to surpass in order to increase the bonus.
if you pass the first, you get half the bonus (see

)
then there is another one, if you pass that, you get the full bonus. no steps in between. I do not know, how much you have to wager / how many tickets you have to buy. Maybe someone could test this?
I am still not able to understand do you mean that what amount of bonus is their we should play according to it multiply btc or buy lottery tickets or what should i do, as i have played double the bonus amount mentioned but my bonus btc did not changed