This doesn't apply only to the streaming companies listed on this site. It also applies to you , your company and your website . Most companies and individuals have websites with a limied amount of web traffic. Start streaming from your website and you enter a whole new ball game in terms of bandwidth consumed. That costs money.
Someone has to pay for the data transmission.
Definitely check and compare how much each bandwitdh provider charges for streaming data. Most Bandwidth providers have a set monthly rate for a set amount of bandwidth. There is a delay. Senders Bandwith Provider's capabilities. Distance from the stream source to the Bandwith provider's node on the internet.