$1000 is potentially 6-8 hours of developer time. A well thought out boilerplate repo could easily save that time if it ticks the right boxes (I've no idea about this project in particular btw).
The Laravel community has a similar offering called Laravel Spark[0], and while it's priced differently ($99/proj or $199/unlimited), the gist is the same. The problem that folks I've talked to run into is that you could easily spend 3x-5x the time trying to figure out why the boilerplate did one thing vs. another, or end up spending time undoing something that doesn't necessarily fit.
Might be too high — not sure yet. It is partially based off of https://bullettrain.co/pricing#now (and I know they're making that work... but there are some differences).
> why would any business want this?
An existing business building a new product? A new business getting off the ground? Don't know exactly yet.