Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
This is pretty much a No Man's Sky situation.
The game started abysmally, then the devs gradually polished it, becoming decent. Unfortunately first impressions matter, and Bethesda did not make any good first impression on Fallout 76's launch.
This negative reception won't matter too much for Bethesda because they can summon the "Elder Scrolls VI" card, prompting them to have people forgive them for their past misdeeds. That's assuming ES VI turns out good in the first place.