You have a solid point on the morality, but one thing is certain, we Venezuelans are having a tough time economically speaking, so most of us are willing to try to get a small revenue from stuff like this, and this is nothing compared to other social problems we got here.
Take a look at this: https://www.google.co.ve/search?q=colas+para+comprar+comida&rlz=1C1CHBD_esVE784VE784&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjvm_nZi8LZAhXCslkKHdLJBHIQ_AUICigB&biw=1280&bih=655
These are the usual queues we got to do, they are empowered by the social "plans" and stuff, and this is where you would have to go when you want to buy food for a "fair" price, if you don't want to wait arround 5 hours on the queue, you got to be able to pay 4 times the real price for food. And honestly, most of us just don't have the money for it. People was often forced at their jobs to go to "parades" (i think thats the way we should call it) to support the government, people didn't even wanted to go, but they went because there was free food and drinks that could help them, save some extra cash so they could hold up a bit more until the next pay day. And thats a bigger morality problem, at least from my point of view.
And about the investors worldwide, we got to accept that most people that have big amounts of money are most likely willing to get more. If theres a chance by this ICO i have no doubt a considerable amount of people would like to get their hands on this project, and thats excluding the people that would use the Petro as a money laundering device.
Want more evidence? Theres the exodus, and the demographic explosion on freelancing comunities, cause by Venezuelans. So yeah, if the Petro comes up to be an option, most of us will take as much advantage as we can from it.