This really isn't quite a mod, but may help those wanting to increase activity on their sites. Currently it's a bit of a jump through the hoops to get emails for watched topics and forums - I've repeatedly had to tell people the couple of things they have to do to get emails.
Here's the mysql commands you put into your SQL Command window to set everyone to receive emails for replies to any topics they are watching:
UPDATE ubbt_USER_PROFILE SET USER_EMAIL_WATCHLISTS = '1'
UPDATE ubbt_WATCH_LISTS SET WATCH_NOTIFY_IMMEDIATE = '1'
and if you also want to set all users to receive email when they get a pm, use this one:
UPDATE ubbt_USER_PROFILE SET USER_NOTIFY_ON_PM = 'yes'
And lastly, if you want all users to receive emails from admins, then use this one:
UPDATE ubbt_USER_PROFILE SET USER_ACCEPT_ADMIN_EMAILS = 'yes'
note: the last one might get a few complaints since I believe it specifically is set by the user to opt out, I may be wrong - it's been a while since I was a newbie