agreed...can say that it's just a marketing strategy....right?
Mostly yes - Sony could definitely sell more units of PS2 - especially in developing markets.
However, with PS4 in the works - it MAY make sense to discontinue the older model. Console gaming is also changing as such - hard core gamers still vouch for PC gaming, casual gamers are moving towards mobile devices (handheld, tablets, smartphones etc), and consoles themselves(PS3 or XBox) are trying to fulfill the additional role of media players.
PlayStation 2 manufacture ends after 12 years | Technology | The Guardian