Yes, most do.
Generally, stores like iTunes, Amazon and others keep around 20% of a sale. We get the remainder of a sale (this is called the wholesale price) and share 100% of this amount to you. This is the case for every label and every distributor licensing music to the digital stores.
Remember, it still means you are receiving 100% of your royalties. The stores need to make money as well!
For stores that offer full-track streaming, there is a proportionate share worked out differently for every store. Therefore, monthly payouts for music streaming sales can vary each month. You can check all the information shared by channels on your Sales Reports.