Is mining rocketscience? Or can you register accounts mining sites and profit?
I have come across several mining sites such as genesis-mining.com. Their smallest package is USD 19. So if I sign up for that, can I start making money then? Or are these mining sites trap for newbies? Can someone help with this please?
You are referring to cloudmining sites. Those sites claim they have mining hardware (so-called ASIC's), and they "rent" out a piece of this hardware to you... You are more or less sharing hardware between all users of this site, dividing the costs of the hardware, power, hosting,... You get a share of the profits that corresponds to your investment.
This being said,
99% of those cloudmining sites are scams. The ones that aren't scams are really hard to ROI (return on investment).
Think about it this way: would those owners of those cloudmining companies sell cloudmining "shares" if it would make them less money than mining on their own hardware? Offcourse not. The 1% honest cloudmining companies sell their complete risk to you in return for a part of the profits.
My advice: stay away from cloudmining untill you've completely educated yourself and can calculate the risk and profits, and offcourse untill you can differentiate between a scam and a real cloudmining company.