or... post a "feature request" on their github to implement keysend payments. For those who already have a channel with them, will be much easier to swap out, using that common channel. https://github.com/BoltzExchange/boltz-backend/issues
Keysend is a powerful LN feature. Some resources here:
I used to pay a merchant using keysend through a channel we have in common. Is really fun: no invoices, no traces, no fees.