A year and a half later - here is a mail I just sent dissolve:
Hello.
On April 2017 you contacted me regarding pricing of my HD footage on your site.
You informed me that since I am selling my clips on VideoBlocks (now StoryBlocks) for $49 -
the pricing on your site will be lowered to match thier price - and indeed that's what happned.
As of This month - the pricing for HD clips on StoryBlocks will rise to a price of $79 for HD videos.
I wanted to make sure you are aware of that - and that you will match my prices back to their original levels.
What do you think will be the response??