Yes, 8.8. Thanks so much for supporting multisite that and subscribe2 fits our needs perfectly.
I did as directed. Copied it to the right path and ran chown on it. I tried activating the plugin and got the same error as I got the first time when I activated it:
"Subscribe2 cannot be activate as a network plugin. Please activate it at on a site level"
(Notice there is a grammar error there: activated)
I then de-activated and then re-activated it at the site level, tested again. Got the same behavior.
$: pwd
/var/www/wordpress/wp-content/plugins/subscribe2/classes
$: ls -l
total 144
-rw-r--r-- 1 www-data www-data 31199 2013-02-24 09:46 class-s2-admin.php
-rw-r--r-- 1 www-data www-data 69651 2013-02-24 09:46 class-s2-core.php
-rw-r--r-- 1 www-data www-data 11863 2013-02-24 09:46 class-s2-frontend.php
-rw-r--r-- 1 www-data www-data 6758 2013-02-24 09:46 class-s2-list-table.php
-rw-r--r-- 1 www-data www-data 5497 2013-02-23 05:26 class-s2-multisite.php
-rw-r--r-- 1 www-data www-data 10669 2013-02-24 09:46 class-s2-upgrade.php