The issue is regarding: this service (Sci-Bay) depends on Google Scholar, yet there's no public API for Google Scholar that it could leverage. If it's scraping Google Scholar results, then it's likely a ToS violation and unlikely to last long.

How much of a "ToS violation" is SciHub, and how long has it lasted?

"If there's a will, there's a way" comes to mind. Also, the fact that all web pages technically already have an "API" --- it's called "HTTP" ;-)

Good for them, I say.