Ajax Easy is a custom way to return whatever you want .
shipped with sub module "ajex easy node " is more of an example how to create custom module that uses custom JS to expose a path argument to ajax ...
the big idea is for custom modules to use:
where you set your custom menu path in the module admin config (hit help)
then feal free to pass 1 -2 arguments to the menu path
gab the values in YOURMODULE_ ajax_easy(&$data) and return what you need ! raw html or JSON for you JS Devs out there.