The terms "legit" "free" and "cloud mining" do not work together. When it is cloud mining, it is going to be paid and it is going to be a scam. All cloud mining sites run a MLM scheme where the new investors money is used to pay the old investors. You can invest in them and you are early in the rat-race you may be able to make some money off someone else's earned money while they suffer, but know this that in any MLM the real winner is the owner who is running the scam and the affiliate marketers.

You may be looking for staking which is also another worthless topic to discuss because it gives no real gain in value.

If you want to mine, buy yourself the devices and start mining. It is not worth today to mine if you mining with a small number of rigs for bitcoin, but you might get an edge with other altcoins. Again that becomes another rat race to change the type of coin being mined based on the market.