Ein Zitat von der Twitter-Homepage:
"Twitter has many appealing opportunities for generating revenue but we are holding off on implementation for now because we don't want to distract ourselves from the more important work at hand which is to create a compelling service and great user experience for millions of people around the world. While our business model is in a research phase, we spend more money than we make."
Letzeres ist sicher richtig, aber ich wette, die Jungs spekulieren darauf, von google oder yahoo übernommen zu werden. Soviel zum Thema "social web".