Even the regular cloud mining contracts aren't producing enough profits anymore so how is this micro contracts any different? I'm guessing the payouts will be lower lol.
EDIT: Oh forget it, I visited the site and it is promising unsustainable profits which is a big red flag furthermore it's an anonymous and newly registered site.
Try doing a simple whois:
https://www.whois.com/whois/bitcointrain.clubDefinitely another ponzi scheme to stay away from
On just basing on the site registration itself it do signifies high risk already to engage with.Checking out this is just an another Ponzi cloud mining site. No matter how micro it is no one would able to invest for few satoshi. For those newbies out there stay away with this because cloud mining wont really be worth it anytime and most of them is scam specially on this one.