The second category is obviously one to avoid at all costs. This was most of the ICO craze. White Papers were tossed out there with no intention of completing what was set forth. It was an early version of a rug pull without the name.
@taskmaster4450 And the sad part is that there were alot of people who invested heavily on this platforms simply because they read their whitepapers and think it is reliable enough for investing on the platforms...