It's not responsible to report about this account without also providing a link to the wallet. I think if the account is powering down, or if the account is not blogging or curating, this makes a big difference in steem power growth rate, but you have to provide a link to the wallet, taking your word for it is not what steemit is all about, it is about decentralized transparency
Like i mentioned this is an article from another user, i dont have access to this account, but i realized that I get less and less interest too. At the beginning i had more than 1% a day without doing nothing, over time i getting less and less. Other users tell me the same. Anyone can confirm he experienced the same?