This software is provided under a dual license. You may choose to use it under the terms of either:
1. GNU General Public License, Version 2 (GPLv2), or
2. GNU Affero General Public License, Version 3 (AGPLv3).
You may use, copy, modify, and distribute this software under the terms of either license, at your option. The full text of both licenses is included below for reference.
IANAL, but isn't GPLv2 strictly more permissive? Why would anybody ever not just pick to use it under that one and ignore AGPL?