One of our local clubs has a program called DBTC ("don't break the chain", which I'm sure was copied from another club), but the idea is that you pass along free frags to others with the intent they will pay it forward later and pass along more free frags when that coral grows up. It's great way to share the wealth, get newbies up to speed (frags are categorized as easy/medium/difficult), and get to know people in the club. Plus, in case of a loss of a coral or even a tank crash, there's a good change you can find free replacements out there from all the stuff you've given away.