Perhaps this can really be used for advertising, but in my opinion there are more successful media.
Therefore, let it be just a “shortcut for deferred links and creeping URLs” .
For myself, I have already found a way to apply such a bit inadequate things. Now you can send someone a link with a comment and you can be sure that if they open the link, they will read the comment. ')
For example a warning about the spooler: Movie Start .
You can create these things here: http://tagt.ru/goto/dc854 . Since this is nothing more than fun, I did not screw up a separate domain.
PS: In the implementation, as you understand nothing complicated.