Eventually, Ponzis always collapse. Early investors may actually profit but later investors get seriously screwed.
So how can I know if a cloud mining company is actually mining or it's just a scam?
I.e. Is there a site that I can check the GH/S of a pool?
You can't. If they advertise that they use equipment from a certain provider you can ask the provider to approve the cloud miner company to see if they actually did order the miners.
What about this?
https://en.bitcoin.it/wiki/Comparison_of_mining_pools
Shows the TH/s of most pools. Is that what he's looking for? Maybe I missed something.
I'm looking for how I can check which address generated the bitcoin, so that I can check if a site is legit, or just a ponzi.
Thanks for the kind advice guys.
So you want to check, for a given block, which computer on the network found the block? Or you want to do this for all blocks?
There's a difference between the IP address of a computer which solved a block and the address where the block reward went. Are you talking about mining or simply sending a transaction. Sorry it's not clear to me from your post.