How does this compare to similar schemes in other countries? I believe Portugal is a popular destination for acquiring EU Passport. The UAE also has a golden visa, but it is not a path to citizenship or a passport.
Usually this gets you residency for some years conditional on the investment staying within the country, and potentially a path to citizenship after some years of living in the country.
https://travel.state.gov/content/travel/en/us-visas/immigrat...
These days they are trying to clean up the mess they created a few years but it did help to keep the economy afloat when they were doing economically ridiculous but ideologically and politically motivated things.