Had BTC, LTC and DOGE on that date, but at exchanges.
So those don't count, correct?
Not unless they were at Yacuna or Poloniex (I think).
I use Poloniex regularly. Would it have been automatic, or do I have to request?
The exchanges will have had your coins at some address or other, and that address will have been given the free CLAMs. Exchanges operate shared wallets, so they typically have few fewer funded addresses than funded accounts.
Poloniex did a giveaway of the free CLAMs there were awarded many months ago now. I missed it too...