Subscribers receive a monthly free digital item or DLC and a "free loot crate" as part of their membership benefits. There is often a free seven-day trial available for new users, which includes a free game, though you must cancel before the trial ends to avoid recurring monthly charges.
This allows you to earn "real money" by sharing a personal "reflink". When others use your link to buy games, you receive a percentage of that sale (typically 5% on digital products) as a commission, which can then be used to purchase anything on the marketplace for free.
The most reliable method to receive free games and items is through the site's official membership and referral systems: