We are fully open source with a proper FOSS license and always will be: https://github.com/ZeusLN/zeus/

Operating entirely on donations as we do now certainly isn't sustainable long term. We hope to fund development of the project with LSP offerings.

There's a bunch of competition in the space, no doubt, but we welcome it all. We will make our LSP offering compatible with as many wallets as possible. We don't mind if you try to compete with us directly as long as you onboard people onto lightning.