Well... Twitter removed the function for people to see all the replies to other people. Which means a lot of follow fridays got lost. A lot of big players are also stopping to #followfriday people because it has kind of lost it's cause.
Have you ever followed anyone thanks to a #followfriday tweet? I'm sure I have only in some rare cases.
What I like to do is write a small recommendation with a reason why people should follow that person and only recommend about 2/3 per friday.
I get as much followers on a Tuesday as on a Friday. so yeah. my 2 cents