I'm not sure what age group your kids play but at what point are you worried about your kids getting burnt out? Playing 6-8 tournaments, 8-10 league games, summer futsal, winter futsal, camps...
I've been coaching older players for several years now and the amount of kids that get to their junior/senior year and are burnt out is alarming. I've seen so many kids lose the love of the game because it's been forced down their throat for so many years.
I think clubs are so scared that kids are going to leave and go to another one that they try to keep them busy and committed all year round instead of letting them be kids.

I've heard so many parents talk about how tired they are from all the time and travel....I wonder if they have stopped to think about how their kid feels?

Just my 2 cents.