Hey,
Yes, Covenant Kodi was down a few weeks ago. And you also know that it is up again. But there is a slight change in the Addon. The original developers are not maintaining the addon anymore. Now, this addon is being operated, maintained and updated constantly by different famous repositories like KodiBae, Kodil, XVBMC, etc. However, they scrap and fetch the content the same way from the internet. In fact, they are now providing the addon even much better. Though we it is not guaranteed that you'll be receiving any malware from it. But it is working very well till date. You can get more info on Covenant Kodi and installation guide on how to install on Kodi v17.6, below it and also on Kodi v18.0. You can also see there how this addon is working on different devices like Amazon FireTV, Nvidia ShieldTV, and much more