Normally, when you play and win a game with any deck from the Starter Deck Duel event, you gain those cards from the deck in your collection. Right now it’s bugged and not adding the cards. From the latest patch notes:
In addition to the new decks, players will also have each of the current new player deck cards added to their collection. (NOTE: We’ve discovered some bugs with this that we’re working to address)
See the recent patch notes for more info.
I believe you can open a support ticket to get the cards added, and I also think that if you have previously won, then the cards will still get added once the bug is fixed.
I think there are fewer people playing both draft and constructed. The Explorer/Standard metas are kinda stale, but really, LTR draft is very boring now and Historic is overrun with Bowmasters and The One Ring. I’m hoping on Monday’s ban announcement we see some changes to make constructed better, but draft is really not fun and we have another month of it.