Some people don't think much about these kind of issues but some are very carrying of these things.They have a worried situation occurs in their mind about their Earning through Blogging that is might be Against the Rules in their Religion Point of view.As Online Earning can be made through Different sources that might be Legal or illegal .
The Word "Haram" according to Muslims is that thing or money that is earned through an illegal Way.So there are a number of reason that you can say the Earning is Haram or Halal that you are earning through Blogging.
Plagiarism and Copyrighting violation:The Practice of Copyright is the Common thing in this whole Blogging World in these Days. Their are number of Some kinds of ways that do "Auto Blogging" by copying Posts from other blogs and Pasting them on their Own Blogs.This Process of Copying someones Blog Post and then Paste into your own Blog is illegal .
But if you have just Copy some words from a Blog and Post them into your Blog in Quotes and also give the Share to its original Source , then it doesn't matter.And if you have copied the Whole post of someone and Also didn't give him a little credit then it all might be called as "Stealing" from someone Traffic,Money etc all the things and revenue that you got from someones Post will be count as illegal and in religion Point of view it is Haram.
Black Hat SEO:Another Kind of thing that is full illegal and widely used in these days is called "Black Hat SEO". These kind of people say that they are using shortcuts and other easy ways for earning online money more then their Hard Work.Black Hat SEO technique is often can be used to get Easily Ranked your Website on Google Search Result Page. However this also against the policy and it can be said spammy way by Ranking Low quality content with these Black Hat SEO techniques.
This not Fair for those Bloggers who have worked very hard to write High Quality Content for their Blog and always keep going with the rules for getting High Rank consciously rather then using Black Hat SEO techniques to get High Rank without doing even a little work.
Scamming:This the most thing that is going on these days.The Story is differ than the looking from outside in their Blog.There a number of Bloggers who have created their Blogs and Makes an trap for getting Huge Layer visitors to their Blog by Just putting the Scam Like "Congrats ! You have Earned 1000$ ! Click here to get Your Money" .In these ways getting All traffic is Haram and illegal and the revenue you got through it also Haram in the religious point of view.
People usually showed those things which are away from their Blog and make an trap to get People for making Scams by stealing their money with their sweet sweet talk.They have much experience for making Scams with innocent peoples by getting their Full Trust on them.
Typically some people posts some kind of Free version of those Softwares which are Paid and in real case they have uploaded virus in it , and make the users to use their Free Version files which were in real is just virus and they wanted to harm their Sensitive data that is inside their PC and this thing also makes a trouble of some people whose Personal Information like Bank Account info or other Personal info gets leaked and then people started black mailing them for the cause of money.This All activity is Haram in religion and also against the Law.
Adult content:The Adult Content sharing for the sake of earning online money is illegal , and in the Religion point of view pornography is also inhabited in Islam and also in society.Some people have used Adult content into their blogs for getting High revenue.
In some Ad networks ,they usually makes Adult Ads for getting Money and Traffic to their Website.These all kind of Ads which were showing Adult pictures are all illegal and Earning Through it is Also Haram and as well as not allowed in the Religions .