Hacker News Reader

Kutcher has 4.5 mil twitter followers, Tisdale has 2.5 mil, it was probably a good way to end up in the stream of the top twitter celebrities to get that initial bump

Preexisting high levels of popularity, I'd presume. One could be curious about what makes for a popular Twitter account.

Or Bill could secretly love TMZ shrugs It's not necessarily incompatible with the rest of his life, albeit unexpected.

There was some speculation internally on this too (I work at MSFT). One theory is that Ashley Tisdale is involved in charity work too and Bill might know her personally. No idea as to how true that is though :)