The following demonstrates how to give your audience instructions on entering a giveaway. This method would NOT require that you use an app like Gleam.io or Rafflecopter. It does require signing up for a newsletter service like Mailchimp, who have free plans.
Step 1: Follow Each of the Instagram Accounts
Step 2: Enter Your Email Address
Enter Your Email Address Here
That’s it! We will run all of the email addresses through a random selector, check that the selection is following ALL accounts and announce the winner!
Using the Gleam App:
The following is a sample entry form using the Gleam.io app.