Save them and spend them all at once?
Right now getting 50 sats from WoF's.
How many daily WOFs do you have? Do you buy them for RPs?
Remember that freebitco works also like a "saving account", which means you get interest from sats you keep active (available) on your account. In other words - the more sats you have, the more you get, which is one more reason to execute WOFs daily.
Yes I agree with you, but even if you win a big satoshi prize, for example 5000 sats. Interests lost are not very large. Because 5000sats stacked during one month of 30 days on Freebitcoin at 4.08% APY give "only" 16.5 satoshis
5000 x 1.000109589^30 = 5016.46
So losing one month of stacking is not so dramatic, I think.