The Hub is a great place to connect and share cards. But with all the trading and giveaways, we never have enough sends to do everything we want. That's why we want unlimited sends, so we are not limited and can use the hub to it's full capacity.
A comment that shows something that is also very important:
If we could transfer all of our points into the card market all at one time, it's crazy that we can only do 500k by the time I get the points together to buy one of the cards for like 2.5 million points the card is already gone....