Apparently atheists and humanists have a lot of spare time to kill in idiotic pursuits.
They are getting their message out and trying to make others like them feel better.
A couple of local preachers here have radio shows. There's all the televangelists. There are religious billboards quite often. Church services, prayer groups, Bible studies, prayers for public events, wanting to put religious monuments everwyere, protests...
I'd say Christians have a LOT of spare time to kill.