I have read in many altcoins announcements these 3 terms, but I haven't understood yet the real difference between them. They seem to me referring to an identical process in which altcoins devs sell some of their coins at a low price.
What's the difference?
IPO: Initial Public Offering, like was done for maidsafecoins
ICO: Initial Coin Offering, like was done for Nxt
Pre-Sale: Selling out before launch, like was done for ethereum
nice example all of that a succes coin