Ask HN: Donating Residential Internet Bandwidth?

I am currently paying a lot for a residential symmetric gigabit link (1 GB/s up and down), with no data caps. I'm seeking ways to "donate" or otherwise make good use of this bandwidth I'm paying for.

I run a few seedboxes, a Tor relay, and a SyncThing relay, among other smaller servers. My network metrics indicate I only use about a 1 TB per day. Assuming 100% utilization, the theoretical maximum data transfer I can sustain is about 10.5 TB each of download and upload, per day. So I am only utilizing less than 5% of the bandwidth I'm paying for, which feels extremely wasteful!

HN, what are some good ways to donate this spare bandwidth? Ideally workloads that are purely network-bound and won't wear out my disks.