Is mining profitable?

I've seen people claim they can use free cloud computing credits with Amazon, Azure and Google to mine for coins.

When I looked at it in the past, it wasn't profitable if you had to pay for the cloud servers. But if you're getting the cloud servers for free, then apparently you can turn 100% of the credits into mined coins. One of the biggest issues with this is the fact that the cloud server providers do not want people mining, so they close accounts quickly if you're detected.