Ultimately, I think you want to be incentivizing people to park their sats with you (at least relatively).

Yes I have that in the mind. We'll try to reduce it slowly as we gain more volume.

The other suggestion I had a while ago was to do favorable rounding. There's no reason to carry around so many extra digits. When sales are calculated round down to the sat and when purchases are made round up.

Yeah - there was some changes, earlier when we started - I think we were using native lnd wallets; where we were able to generate invoice with milisats(msat) precision. Then we switched to lnbits for wallet management - by default lnbits only generates invoices with sats precision (not msat) - since then we've also been loosing on the rounding. I really like ability to charge users with msat precision - that's the beauty of lightning. But if we can achieve that with lnbits, then we'll switch to favorable rounding. I'm in close touch with one of the core lnbits dev, hopefully he'll be able to shed some light on msat precison issue.

I'll re-listen to the podcast again. Thanks for all your support and feedback.