Netflix Premium with only 15 euro?

I bought a 15 Euro prepaid card for Netflix, and now I have noticed that Netflix Premium costs 15.99 instead of 15. What happens now if I select it? Will it be shortened by a day or what will happen?

You can most likely only get this for 7.99.

You can only buy the cheaper one

Pity

However, you get an upgrade to the one higher package in your first month, which means you would still have that for 15.99 in your first month even if you only pay 7.99.

You can get this for 11.99 euro and get the premium for it. It's always like this when you're new to Netflix. It's kind of a gift, which I also made.