"You may follow (person's name) as well by clicking on the 'follow' button on their profile."
Jesus H. Christ! Hey, Biz Stone, (btw, I'm blogging on one of your earlier creations, thank you) 99 percent of the people who follow other people are people (or more precisely a person). That takes the SINGULAR PRONOUN. Please change your email notifications so that it reads
"You may follow (person's name) as well by clicking on the 'follow' button on his or her profile."
Or
"You may follow (person's name) as well by clicking on the 'follow' button on the user's profile."
We're cutting back on education funding in these dark economic times, Biz. Don't contribute to the dumbing down of America with one of the most popular social media features of the day.