people have very short term outlooks.
And the initial cheaper price makes the difference for them, even if long term it is more expensive.
It is like that experiment that was done. I dont remember it exactly, but it was something like:
They asked X number of people: You have two choices
A. I give you $1,000,000
B. I give you $0.01 on day one, $0.02 on day 2, $0.04 on day 3, doubling every day for 30 days.
Most people take choice A.