The foundation does not advertise this much, but they run a really lean operation and it would probably help to donate a bit to them. You can donate directly to them via a few means; PayPal and card, bank transfers, and Bitcoin.

Currently OSM are having issues with their ISP and still are operating from their backups in read-only. Having more funding so they can afford better redundancy may help them in future situations like this.

Also, OSM is very important imo and it would be terrible if they didn’t receive enough funding to continue existing. Donating should help safeguard against that.