Message of explanation from Google. Who knew?
The limit of 100 members (including of course you) is hard, and is based upon a system limit. If you have over 100 people reading, including some reading using the "invitation preview", eventually one of two things will happen, to somebody:
- The invitation will expire, and your "member" will become personally insulted.
- The "member" will try to exercise the membership, and the system will terminate with an error (maybe, a bX code). The "member" will be personally insulted.
Complicating matters, we have the two GUIs, each with their own different limiting policies - including the "2 week limit", which is not consistent. And some owners have found that you can jump back and forth between the GUIs, and maybe wring one or two more "members" out of the system (similar to writing a cheque to the phone company, and sending that with the bill payment to the electric company).