Future studies of Friendster–and indeed of platform death–might look to actors, especially users, that offer starkly competing visions of a platform’s life and death.
It is a discussion that I don't believe has a defined answer or endpoint. From my perspective, I see a platform as being able to always stay alive if it so chooses to keep its doors (or domain) open. The probe of upkeep and money will eventually be the downfall of an unprofitable platform, but theoretically, the only way a platform or program can die is if the plug is pulled by the creators themselves.