Tomorrow, I'll work on writing a way to do voting on proposals with BTC used as voting shares (This will be difficult as I do not know FORTH).  That seems like a fairly simple, useful example that will require loops and reused functions.  I'll add a fee that goes to the creator.

IMO, if you write a complicated system of scripts that's used frequently, it makes sense to charge a fee for its usage.  A decentralized exchange between colored coins, for instance might take a small fee on each trade.