Thanks for writing this up, I'm going to include it in my recommendations to people on writing comments.
Regarding upvoting, one of the glorious things about being a plankton like myself is that there's essentially no monetary reward with my vote, so I don't really have to worry about my VP and such. However, I have started to worry a little bit anyway, so it was nice to find out about @remind.bot.
Thank you for the write up. Extremely busy today but I will have a look at your post this evening. :)
I also love remind.bot :)