What a strange idea to name your product after it's price.
100 = € 103,-
200 = € 229,-
500 = € 509.99,-
Besides the naming being insane, the pricing strategy for each seems to have been made by a different team.
So expect further downgrades in the plan features for the same price.
It looks like they have literally chosen the most straightforward sounding plan names they could think of.