This is what the email they are sending out says-

"Thank you for your interest in a career with Allegiant. We are rapidly transitioning our fleet and foresee many opportunities for the future.

We have reviewed your background and qualifications for the role of First Officer and would like to move forward with your application once additional class dates become available.

Over the next few months, you will receive communication regarding our transition, hiring events, and Allegiant’s growth. Once class dates are available, you will be notified of your next steps within the interview process.

Should your situation or interest in joining Allegiant change, please be sure to inform us so that we may update your application.

We look forward to talking with you soon!"

- I haven't heard anything since receiving that email a few weeks ago, but they're obviously building up a pool of applicants.