Board Game Arena

I watched a game, a player plays sponsors (II) from place 2 plus an x-marker. As far as I understand, he is allowed to play cards with a total value of 3+1=4. But he plays 2 cards with a value of 3 each, so 6. How does that work?

Table #571898198
Move #367

If it is the map with 3 "H" spaces, the unique power of that map decreases each sponsor cards' cost by 1.

Oh yes, thanks, I guess I was a bit overtired.