A bonus that you will never get.
The statistic of the whole December (1st-31st) will be counted.
Yield plus 15 before anyone joined.
To make it even worse with the second condition
Statistic of your 30 days subscribing period. For example, you subscribe from 10/12/2014 to 8/1/2015. That is your subscribing period.
To continue with the two soccer teams. You telling them lets play soccer for the next 45 minutes but before we start I lead with 15-0. Even when you scores 16 goals and defeats me with 16-15 I get some extra time for trying to defeat you'.
I am not trying to be rude or judging your picks or price. I am trying to tell that if this is your final profit guarantee you can better cancel it as you suggested yourself. As it is now this is a bonus guarantee that will never happens. You know that and everyone who read the terms and looking to the current yield knows that.
This should be the only condition for the subscribers that joining between 10-15 December
Statistic of your 30 days subscribing period. For example, you subscribe from 10/12/2014 to 8/1/2015. That is your subscribing period.
Not this one
So that the statistic of the whole December (1st-31st) will be counted
Just my 2 cent. It is your businesses. You specified the conditions today after your first subscribers. This bonus profit guarantee that will never happen is not the most important part but you advertise it on your thread. An advertisement is a part of your image.