I wonder if they think they are fooling anyone with the way percentages are rigged when breeding goals for common dragons are active in an event. I guess they believe that coinciding boosted breeding with breeding goals covers it up?
There is no difference in pressing the normal breed button as opposed to pressing the boosted breeding button during free boosted breeding either. Also, you'll notice that the boosted breeding button will remain at 200 silver after the boosted breeding "officially" ends. I've been burned by that in the past. If you press boosted breeding at 200 silver it will take your gold. I've sent several bug issue reports on this. I guess it's a "feature" and not a bug....