Free spins don't have expiration. In my case, I used to keep my free spins because i'm lazy to play it everyday so I decided to just let it there. I have 3k plus FUN (originally it's only 2500 when I bought my tokens but I gained interest for locking it few times both short and the maximum period).
I can't remember the last time I use my free spins, then last week I play it all, a total of 1300 plus spins. I think it's been a year or more since the last time I play it and it took me few hours to claim it all. After claiming I already sell my FUN to use to gamble but unfortunately it didn't turned out well. Obviously it's not a good decision so i'm planning to buy again while the price is still cheap.
Maybe you are a busy person? But for someone who is not in a hurry and they are also bored, they will like to play their spins slowly. Not only per day but they will also spin it one by one. There must be a different kind of thrill of doing it and I think I can get a better prize this way than if I spin them all together.
If your last claim is last year then I can't imagine the amount of free spins you are having now. That must be huge? And you see, it takes time for you to collect them all but if I were you, I will just sit my fun tokens there to earn passive returns and exciting rewards than gambling them because you can surely lose them quickly.