In my opinion, You must regularly claim the faucet when you have exchanged your RP for boosting rewards from the faucet, at least you have to roll more than 10x, less than that RP will be wasted.
It's not just your opinion at all. And it's been posted many times already before on different calculations, which you can easily do yourself.
Because base now is only 3/4 satoshi, and the max boost for free BTC is 1000%, so you only get 40 BTC extra per claim. Do this 24 times and you get only 480. Do the math. Not profitable.
RP rewards is constant, so it's always been profitable after 12 rolls.