why are online earnings turning scam nowadays

hi, i think it because online earning more knowing now around the world,so that they use that time to get more money trough scamming to other people.

Sites close all the time because either the owners cheat users out of their money, or users cheat owners out of their money. There are also some people who make scam sites for their "job" and steal other people's investments in the site just because cybercrime is relatively hard to stop unless it happens to be millions of dollars lost, that's when the government actually notices scammers.

I don't know why those people not having conscience to scam people? I don't know why they are so greedy and scamming people who wish to make some earnings online. After they get some money they stop operating the site...

That is one of the issues here on the internet. There are so many scams. There are lots of companies trying to convince you that you can earn and some even want you to invest to earn certain amount. But after you have given them your money, time and effort when it's your time to get your earnings, they turned into a scam. It is indeed very frustrating. I have been scammed a lot of times, but I have been paid also. Well, it's like a gamble. As long as you know how to research some companies and be careful. Don't invest too much also.