I put up a post to pay for blog comments on DP. I got plenty of response but the blogs they listed that they would post on are not in the theme or category of my website. Does a blog comment with a backlink to my site need to be about the same theme or category my site is or not?
There is basically two types of link building. The first in link building for anchor text and the second is link building for Page Rank. When you are link building for anchor text (i.e. to get ranked for particular keyword) then the content of the page you put the link on is probably more important. When you are link building for PR the content of the page is probably less important. So in the PR case if your site is about surgical equipment and you link to it from a quality page on cars, you will probably help your page rank development efforts. What you don't want to do is to get links from spammy sites when you are link building.
Don't waste your money or time on building backlinks from unrelated sites. Just because it's high PR doesn't make it a relevant link. That's the whole point of Google's algorithyms. Think about this, when they were designing the algorithyms, they think about the user first. Why would Google care about a link from a site that has nothing to do with the topics you discuss? And, especially as they refine their algorithyms, you are going to want the most relevant possible backlinks possible. But, that being said, backlinks are backlinks. There is nothing wrong with creating non-relevant backlinks, but I feel it is worth your time to focus on relevancy, just as much as Google.
Did you put your site there? You should inform them that you are looking forward to those related sites only. If you will post a comment on not related blog.. your site will be in trouble and will be called spam or possible be banned by Google.
At first, when I did blog commenting... I find it hard to look for dofollow blogs that are within my niche. Lately, I just comment on any dofollow blogs.
I don't agree. Backlinks are backlinks If you get links from sites with related content, maybe they will get you more visitors, or better traffic, but about SEO, is a link, no more no less
It is one type of link building method. You can try it but it is always better to post comment into related site, otherwise your keyword treated as spam keyword.
Is not that easy. You know why? because, it will be really easy to hurt a competitor's site just by getting backlinks for them in unrelated sites If you want to test it, get some really unrelated backlinks for a site that's not yours, and see if they drop or go up in the serps
one of the ways to get your comp is to target "bad neighbourhood" keywords, ie viagra, porn, then link them to your competitors site and watch the effect...
Blog comments really hold the smallest value possible, you're best off directing your time at other methods
Right! I would like to say build backlinks via blog comments is not a good idea! If you comment on the relative blog, they might be your competitors. So, they would tag your comments as spam. Thus, you would be banned from further comment on other blogs, especially in wordpress blog.
Blog comments are great - they are for free, easy to find and can get few of them every day. Make sure that you are not spamming. Check previous comments... If all are few sentences long and it's anchors aren't spammy (are authors names) do the same but instead of linking to your site, link to your blog where you have nice blog post with links to your site.
You want to post on blogs that are related to your niche and your comments preferably should mention something on the blog you are commenting -- otherwise your comments may be deleted (for spam) and your will likely not get any search engine ranking benefit.