[PanMan]

There they refer to "active installs". Its still possible they sold 100K apps, everybody tried it (used a token), and 60K people deleted the app again. Those people then didn't reject their token in Twitter's app setting (which almost nobody does).

If it were indeed 60K pirates, that would really suck.

[Onelow]

Don't forget that logging in with multiple accounts on the same install also uses a token per account.

[micampe]

The Play Store says the app has 10,000 - 50,000 installs.