Swap.btc is held by the Hive Engine and in terms of centralization it's pretty much the same as my KeepSats.
The difference here is that you can move KeepSats in and out via Lightning network with nearly 0 fees (a few sats sometimes).
Only when you convert to Hive or HBD is there a fee. Swap.BTC is basically a dead end holding point.
I use Binance and CoinGecko and average across those for the Hive/BTC rate but I take the HBD/Hive price only from the internal market.
Thanks for your reply. I've already used the service the service and as you mentioned in your last video it wasn't the seamless UI experience, but still managed to send some sats converted out of Hive.