[pothead]

I don't know why people would get discouraged if it would not be permanent.
Anyone who worked with sales should know that you not less likely to get a customer by saying that something is for a limited period only.
It rather the opposite and people will discard any hesitation to take advantage of the offer while it's still on.

If it indeed was their intention to do this as a limited period offer I think they would be smart enough to promote it as one.
So I do believe them when they say they trying it out for a period to see how it goes.