^ Minato throws his kunais in every direction before he teleports anywhere. This would prompt any decently intelligent user into thinking that these 'randomly thrown' Kunais would serve some purpose otherwise there wouldn't be any reason to scatter them over a certain radius. This would follow with a long ranged Katon attack that would damage the Kunais, rendering them useless.
Regardless of intel, these Kunais would be dealt with because they are thrown around the user. Hence the reason 3T Madara take the victory. His Katon attacks have immense range and Minato is not going anywhere without his Kunais.