Why Xbox games on strange sites has much lower price than in official stores?

The reason games are cheaper there is because they're third party sites and depending on what you're accessing, usually not trustworthy. Another example is G2A.com, you can games on there for dirt cheap compared to their retail price on Steam, but you're
not guaranteed the game, especially if you're not buying from a reputable seller.

Tl;dr: They're third party sites and more than likely not reputable sites.

in the community they sell digital game codes at a price lower than in the official store

can u close them ?

Hi, Nobunuki. My name is Ron, I'm an independent advisor. I will be more than happy to help you.

I'm sorry if that is the indicated price on the Microsoft Store of your region for the game, that is definitely the correct price.

Each region has different prices and they don't base the price on one region only. There will be regions that have much lower prices and there will be regions that has much higher prices for games.

PS4 and Xbox One prices are actually lower than that it's place holder.

Also the PC market is more competitive that's why the prices are lower.

[quote user="Symtex"]

What do you suggest that we do then ?Games cost a lot more to make than they use to and publisher has to sell a lot more copies before they recoup their investment. Lowering the cost of game could be an option but it also puts the stress on the publisher
to sell even more copies.

[/quote]

When you lower prices you increase demand. The PC makes just as much money for the industry as either console does, and it has incredibly low prices comparatively. Why? Because when you sell at a lower price, more people will buy. It's simple economics,
publishers just want to pretend that they can force demand to meet their prices, and that is the source of any of their ills.