@Fallingwater,

I guess the always-diminishing number of people still using WinMo combined with the lack of developers is the cause of this. Maemo is a tiny minority, but a big chunk of the community is either a developer (in some sense) or at least has some interest in the further development of Maemo. This makes us very special

People using WinMo who need Whatsapp probably just buy the next Android/iOS/WinPhone device available without giving it much thought.