Yes, we use $ for peso and US$ for dollars because that's what our current customers would expect. We might have to localize the page once we grow.
I feel putting CLP$ would be confusing for them now!
As far as I know, it's the same for other LatAm countries because "$" originates from the coat of arms of the Spanish Empire:
Also this is available for Chile only? I'm in Bolivia, will be able to invest?
The site needs communication work.