AngularJS- understanding angular-seed module style

Many angular examples use simple global functions. Angular-seed and yo angular use a more complex coding style. Here is an example of a simple styled example from stackoverflow/jsbin: http://jsbin.com/lucit/8/edit

var app = angular.module( 'app', [] );
var MyFunc = function() {
  this.name = "default name";
  this.$get = function() {
      this.name = "new name"
      return "Hello from MyFunc.$get(). this.name = " + this.name;
  };
  return "Hello from MyFunc(). this.name = " + this.name; 
};
// returns the actual function
app.service( 'myService', MyFunc );
// returns the function's return value
app.factory( 'myFactory', MyFunc );
// returns the output of the function's $get function
app.provider( 'myProv', MyFunc );

function MainCtrl( $scope, myService, myFactory, myProv ) {
  $scope.serviceOutput = "service = "+ JSON.stringify(myService);
  $scope.factoryOutput = "factory = " + myFactory;
  $scope.providerOutput = "provider = " + myProv;
}

What follows is an attempt to rewrite a simple example in the angular-seed module style: http://jsbin.com/hitun/4/edit

var MyFunc = function() {
  this.name = "default name";
  this.$get = function() {
      this.name = "new name"
      return "Hello from MyFunc.$get(). this.name = " + this.name;
  };
  return "Hello from MyFunc(). this.name = " + this.name; 
};       

angular.module('app', [
'app.controllers',
'app.services'
]);
angular.module('app.services',[])
  .factory('MainData', MyFunc)
  .service('MainData', MyFunc)
  .provider('MainData', MyFunc));

angular.module('app.controllers',[])
  .controller('MainCtrl', [function($scope, myService, myFactory, myProv){
    $scope.serviceOutput = "service = "+ JSON.stringify(myService);
    $scope.factoryOutput = "factory = " + myFactory;
    $scope.providerOutput = "provider = " + myProv;  
  }]);  

No matter how I try to tweak the syntax, I get errors.