You don’t need to lock the tokens to receive the benefits. Most of my tokens are also locked for a long term but that is mainly because I bought most of mine in the beginning so the price of the FUN tokens will need to go up with a lot before I would even be breakeven. Currently also accumulating the WOF spins; waiting on a drop in the BTC prize so the base rewards would be a bit bigger.
Also, you do not need to lock your BTC in order to gain interest on your total accumulated balance. I recently got this email from freebitco (other may get this too) showing my total interest earned and remember i did not lock any of my bitcoins.

By the way, if we gather fun tokens on freebitco, do we also get interest on them as well? and if so, the same percentage 4.08%?