Is it okay to buy 5-star ratings

Is it okay to buy 5-star ratings? I received the following email from OnSong app…

There's still time to give OnSong 2023 a 5-star rating and review on the App Store! If you're one of the first 500 people to do so before June 30, 2023, we will send you $5 via PayPal! Just send a screenshot of your 5-star rating and review to. We always appreciate positive feedback!

If you can't honestly give OnSong 2023 a 5-star rating, then we want to do everything we can to assist you and improve your experience. We welcome you to reach out to us by opening OnSong 2023 > Utilities gear icon > Support > Contact Us, and let us know how we can help make things right for you.

[Link Edited by Moderator]