Anybody can run a full-node on a $10 rasberry clone, many do, with a full node, you can run your own electrum-server ( another 300GB), and thus you can sponsor your own private-wallets for real security to bypass the exchanges and internet blockchain spyware
A $10 Pi node does more damage to the network than good. It barely gets to download and verify the blocks, let alone share them with other peers. I've tried it, and it's a pain in the arse.. it barely lets you even download and build Core from source. So why run a node you cannot do anything with? Just to add it up to the total of running ones?