I discovered chrono.gg through a youtube channel (of an Indian guy) - Low budget gaming.
Hes great! Making announcments about free games.
I just became a collector of free games. So since 2017 I obtained over 200 games for free on Humble bundle &Steam (over 100 games), EPIC(25), GOG(22), Origin(8), Uplay(8 great games) Gamesessions(3), Discord(1), Battle.net(1 - Destiny 2, that will be Free to play soon), Bethesda launcher (1)
And this community helped me to get next some few games from coin shop and successfully traded some Wanted games for those I wont.