If you will send 1 type, most of them after they will accept it, will click on send it back.

Tip for you, don't send same to all, send red to some of them, blue same, green same also same with skill points and then you will get them all, or simple write them a message and ask them to send you everyday just 1 type.

Write to A,B,C to send you red, to D,F,K to send you blue, to X,Y,Z to send you green and to F,G,H to send you skill point