You probably don't have a premium account; you have the whatever they call the new premium accounts. The premium accounts are legacy and don't get new features, so you just have those features and don't get advertised them.
There are also the thinly veiled 'news' emails that show up with special CSS flair in your inbox- but it's not news, it just them trying to upsell you stuff and get you hyped about [Latest Product].
I'm surprised it has managed to stay alive for so long, in the first place.
Thank you for the write-up, it was informative!