While the footer text contains a link to your widget, other users won’t be able to access it since it requires login credentials to your Elfsight account. You can test in incognito mode or in a browser, where you’re not logged in to your Elfsight account.
At the same time, I totally get your case and agree that it would be awesome to edit/remove the footer text. We’ve previously discussed this idea with the devs and they do have plans to investigate this task in Q2 this year. We’ll keep you posted on any changes in the Wishlist thread.