The Bungie Foundation is working to provide help for the folks impacted by Hurricane Harvey in Houston, Texas. They’re working with Direct Relief in order to make this happen.
They’re officially selling a “Destiny 2 Bungie Foundation Collectible Pin with Emblem” on the Bungie store at the source link below. Spend $14.99, get the pin and an in-game emblem that indicates your donation.
According to the item’s listing, “All profits from sales of the Bungie Foundation pin go directly to the Bungie Foundation.”
You can always contribute to other relief funds through all sorts of ways. I’ve done that already, myself. These in-game items, to me, are more than just a badge of showing off. People might ask you how you got the badge, you tell them through donating and that might push them to help when another disaster strikes.
These campaigns, in my mind, are less about showing off and more about encouraging others to get involved.
If you’re in a position to help, consider it. This is just one avenue.