I believe that this particular forum (Nabble Support) is:
* more for helping all users of Nabble with features of the Nabble service
— (some forum owners choose a 'Newspaper' appearance for their forum)
* less for advising individual users on how to promote their content.
You may gain more relevant advice, and sooner advice, by asking this type of question in one of the fora that are focused on promotion. See for example the list of fora that match the word 'promotion',
<
http://n2.nabble.com/forum/Search.jtp?query=promotion&page=0&fsearch=y&daterange=0>
I hope that helps.
Kind regards
Graham (Nabble user)