hey, Blog Commenting is useful in getting your site indexed and getting quality backlinks for your site.
But I think using grey hat for long time will also affect the rankings. Hard work ( white hat ) will yield long lasting results.
According to me this technique consider as a black hat seo technique. And also it will be harmful for your site, If you use auto blog commenting software, might be some negative impact on your site such as irrelevant commevennt, contrae the policy of blog, signature will be not shown. So, do it manually.
Blog Commenting is an effective method to gain back links, but i will not recommend anyone to use auto submission software.
Its not a good idea. In order to make an approved Comment,make a genuine relevant contribution. However,if any software is helps you find blogs, make comment manually.
A blog is a platform where information about any subject is presented as posts displayed in a specific order. Blog commenting service is one of the most powerful ways of improving your website’s ranking in the top search engines.
Posting thousands of comments on blogs, mostly irrelevant to the content is considered spamming. And I'm not really sure what benefits this has. It can have some traffic but most of it is irrelevant and untargeted, so you cannot expect much conversion from it. If your site has too many links that are no follow, it can be penalized in Google. So it is better to concentrate on content and high quality link building than to go after blog comments.