cloud mining is like a ponzy .... a kinde of scam so take care
If company has no miners and just invest money it is ponzi. But we have pretty reputable companies which actually mine. Just stay away from the shady ones.
Is there any reputable company left which is profitable, considering the ever rising difficulty of the network ?
No. Due to the recent price crash, Maintainence fees/GH has risen thus your profit would be very low. Most reputable company charges large sum for a small hashrate.