Guru 3D reports that Destiny 2 is free for a short time:
Now here is a cool free game to grab, Destiny 2 is free for anyone who does not already own the PC game will have the opportunity to claim it as a gift through their Battle.net account.
Destiny 2 will be free to claim and download from November 2–18, 2018. New Battle.net accounts created after 11:00 a.m. PDT on November 2, 2018, will need to enable Blizzard SMS Protect before claiming their free copy. Destiny 2 PC is redeemable from the Link Removed.