You’re reducing load on the bigger instances by not using them directly, which is giving something back

^ Lenovo tiny thinkcenters are the best thing ever. Heck, I use the older haswell-era M73s that you can get for $30-40 on ebay and they’re amazing. Only drawback is no m.2 and no PCIe expandability but if you’re on a budget and want a starter homelab you can literally cluster 3 of these things for ~$100