Are they all just simply scams? or are there actually some legit ones out there ?
If you want to start mining cryptos, forget about could mining. I have used Hashnest for cloud mining and all I did was lose money. Even though Hasnest is Bitmain's cloud mining arm and one of the most trusted cloud mining services it failed to give any profits at all. If you want to get into cloud mining be prepared to put together an operation on your own and avoid cloud mining services at all costs.