What exact is the test for?
To see if people will fill up 2 flights? Will that prove anything?
I'm assuming they mean 2 RT flights?
Interview with CEO points to testing the economic viability, having 2 crews instead of 1 etc, if people will be filling to purchase tickets, and people's ability to tolerate such a long flight.
2 Return flights 10 days apart
Doesn't make sure sense, I agree