https://www.gamespot.com/articles/get-destiny-2-on-pc-plus-more-games-for-12-in-june/1100-6458742/

If you play games on PC, you may be aware of the Humble Monthly gaming subscription. For $12 per month, it grants you a monthly bundle of games worth over $100. The only catch is that most of the games in the bundle are a mystery until after you've paid. Humble does announce at least one game each month as an "early unlock" to entice new subscribers. The early unlock game for June 2018 is one of the biggest games ever featured in the subscription: Destiny 2.

If you subscribe for June's offerings--whatever they end up being--you'll get Destiny 2 immediately, just in time for the Warmind expansion, coming May 8. After that, you'll have to wait for the end of the month to find out what the rest of the games are, (though occasionally a game or two will be announced in the middle of the month).