I am very glad , that there is someone really care about this campaign and asking the real question ( not like the  sig spammer) .asking for tons of "I need" and no action.

this is a very good question

Answer: as the cost of this promotion is expensive ,the campaign will not be a long one . and What is more, I  find this forum is full of shit and the campaign will be shortened.  

I can promise you ,if you join the campaign. the campaign will be, at least, there  for one month with paying daily(24 hours).