Q About Link Building from Forms

I'm a complete newbie when it comes to link building, but today I got an idea and I need some advice if it would work.

So, I'm seeing a lot of websites that have forms like this and obviously you can put your link in the comments. Question: are these effective in ranking?

Also, some problems:
1) Many forms have ref="nofollow"
2) Many forms require comment moderation, so a moderator needs to approve the comment.

My idea was to collect a bunch of such websites and then create simple software to automatically post on all of these forms with my link, maybe even scrape the internet for some new forms and just keep adding them to the system. But would this work?

These types of backlinks can be good for diversification but don't expect to rank alone with these links. I like the idea though, selenium should be the choice to create a bot for this.

Geasy said:

These types of backlinks can be good for diversification but don't expect to rank alone with these links. I like the idea though, selenium should be the choice to create a bot for this.

Click to expand...

Thanks for the reply. Good to know that they are not useless. Selenium might be really slow to handle 1000s of such forms, http requests are the way to go imo