Did you even read the article?
It's not a diploma mill. Amazon is funding tuition for any accredited school, as long as the coursework is in the list of in-demand fields. There aren't kickbacks (Although if there were, so what? It would just mean it's not as generous, not that it's a scam.).
Amazon is also willing to pay for 95% of the cost, up to their annual limit. At a community college, that will generally cover everything. There is no saddling anyone with ridiculous debt.
This is a genuinely good program. There is no scam or any taking advantage of anyone. How did you even invent this in your imagination?