I feel this atm is done "following the rules". It could be easily a DIY project done property with non-custodial setup. Shame is not. Another Satosys.tech product, not sure this is provided on a free basis like the piggy.tips one #1220015. here is how they split revenue with partners
Spondulix harnesses the power of the Bitcoin Lightning Network for sending and receiving the micro Bitcoin amounts, its P2P nature allows for lower regulatory overhead compared to traditional Bitcoin ATM’s.
Lightning payments are fast, cost-effective, and offer enhanced privacy compared to on-chain transactions. With Lightning, you only pay minimal routing fees, giving you a significant edge over traditional methods.
And here is a good intro on how it works in details