Lol everybody has their own strategy and I find it always interesting to see results of other people that have saved their spins.
Truth be told, I don't have any strategy as such when it comes to the free rolls. I get five per day and allow them to bank up for a few days (not more than a week at a time - usually) as I'm not online as much as people might think. When I do roll, it's interesting to see how few of one or the other prizes there are, or, conversely, how many of one prize or another there are each time.
If I win enough bitcoin from these banked rolls to buy another 100 FUN tokens, I do so and add to my 365 day investment. (It'll be interesting in about eleven months time to see what people do with their FUN tokens)
I pretend to continue holding FUN tokens and lock them for another 365 days time period if Freebitco.in keeps the currently benefits bonus program for holders. I'm not too worried about FUN's price because what has been worthing so far are the advantages we have inside the site by holding these coins and not their value specifically. Since it remains like this it will be fine.
At least in my case the strategy they used to incentivize people to hold instead of selling worked. Now let's see if another investors will have the same mindset.