gistfile1.js

Template.profile.onCreated(function () {
  this.subscribe('profile', Router.current().params.username)
})

Template.profile.events({
  'click .follow-me': function (event, template) {
    console.log(template.data) // null
    //Meteor.call('follow', this.user._id);
  }
});

Template.profile.helpers({
  user: function () {
    return Meteor.users.findOne({username: Router.current().params.username})
  },
  following: function () {
    return this.user && _(Meteor.user().profile.followingIds).contains(this.user._id);
  }
});