As per the [Help][1] section:

> If you are an experienced Stack Exchange network user with 200 or more
> reputation on at least one site, you will receive a starting +100
> reputation bonus to get you past basic new user restrictions. This
> will happen automatically on all current Stack Exchange sites where
> you have an account, and on any other Stack Exchange sites at the time
> you log in.

Basically, you only get the +100 bonus points if you have 200+ points on *ANOTHER* StackExchange network site.

According to your profile, you are only active on Drupal Answers, so you don't qualify for the "bonus" points.


  [1]: https://drupal.stackexchange.com/help/whats-reputation