I would not use the comment section to promote anything. The "report" feature on Instagram comments has gotten easier for people to use. I use it all the time to keep spam off my pages.
This is the "method" I use to direct people to my main page:
1. Open a main account. Name it "Love".
2. Open an extra account. Name it "Joy".
3. Post a photo to Joy's account with instructions to go to Love's account to receive an incentive.
4. When they get to Love's account, they receive the incentive.
5. Repeat steps 3 and 4 over and over.
6. Voila! You have followers, comments, and likes from REAL people.
The reason you know these are real people is because a bot will not be able to read instructions and click through to your main account. So basically, Joy is like a Google results page, and Love is like a website. You want to put something on the Google results page to get people to "click through" to your website:
Joy = Google results page
Love = Your website
Photo on Joy's page = The big blue link on the Google results page that you click on
Caption on Joy's photo = The snippet under the big blue link on the Google results page
Do you get it?