I've used the vbulletin and Xenforo version of this addon, works very well, only takes an ~30 minutes to setup. After that I spend 10-15 minutes each week curating threads for the newsletter. Way easier than a homerolled solution. Especially useful on vbulletin which has the worst email system ever devised :P
Makes running a regular weekly newsletter so easy! Give their AI feedback for about 2-3 months to let it know what you like and what you don't in a newsletter, then just let it run on auto. It's amazingly easy and my community loves it!