Is it better to send calling card early Persona 5?

I'm curious, in the context of the game Persona 5, do you believe it's advantageous to send calling cards earlier on in the game? Some players argue that doing so can help establish stronger relationships and gain valuable rewards, while others contend that it's better to wait and use them more strategically. What's your take on this? Is there a specific strategy you recommend when it comes to timing the use of calling cards in Persona 5?