How much volume of transactions did Lightning have for those services last month, compared to its onchain counterpart?
A CTO of Bitfinex
shared some data in June on Twitter.
Withdrawal stats (last ~24h timeframe)
~2.6 BTC withdrew via #LightningNetwork ⚡️ , across ~100 invoices
~3.7k BTC withdrew via #bitcoin mainchain, across ~600 outputs
[...]
~11BTC in deposits via #LightningNetwork ⚡️ in 24h (across ~1000 txs).
~1k BTC deposited via #bitcoin mainchain, across 500 inputs
Bitfinex has two Lightning nodes. They even share their current liquidity
here. At the moment, they have ~90 BTC inbound capacity and ~311 BTC outbound capacity.