Anyone else feeding Native Earth feed notice?

I've been getting the Native Earth 4018 for several months now, and the price was always less than ten bucks a bag and about twenty a bag with shipping. All of a sudden the price has doubled and I can't seem to get an explanation out of the company as to why. Anyone else notice, and/or have an answer?

Thats alarming...

When it was at $13 and change there was a sign that said limited time offer. It was probably a teaser price to get people to try it out.