Ok, but who are hosting these sats in fat channels for people just getting started? These are by definition custodied sats in existing channels (onchain utxos) until it’s economical to create a non-custodial channel.

Or we get mutli-party channels.

"Hi! I'm new to Nostr and want to try out zapping, what wallet should I use?" "Whatever you do, stay away from custodians because they can rug you. Go get yourself a Start9 for $900, install Bitcoin Core, LND, and Alby Hub. Then you'll need to get about 1m sats for your first channel. You might be able to get away with 100k+, but it's really best if you go with at least 1m. Oh, yeah, that's over $1k right now. Don't worry though, you still own that money so it's not costing you anything more than the on-chain fee to open the channel. Now you have to decide who you're going to open it with. Go research well connected nodes that allow people to open channels with them. What do you mean you can't receive? Oh! You need to have inbound liquidity. You'll have to zap some people so that there is liquidity on the other side of your channel before you can receive any zaps. " Yeah... Not feasible. Custodians are a great first-touch, and people can upgrade their sovereignty as they go and as they learn and get interested in doing so.