Never heard of it, though I think mine, too is Advantage. Pays for my gym membership. All I pay is $25 a year, instead of about $40 a month!
As for the point of the article, if it comes to pass, you may want to reconsider waiting to age 70. Perhaps talk to a Social Security agent.
We were really lucky. After we both turned 66, we got a letter inviting me to apply. We were getting ready to fold a consulting business. The letter suggested to find info on the web but we decided to go to our suburban office to see whether one of us would be better off getting half of the other, etc. On our drive I read the letter, again, where it suggested to make an appointment. Oops.
Still, I really don't know how many agents there are there. She worked with us for a long time, preparing spreadsheet, looking at breakeven analysis and we concluded that we would be better off collecting our own individual benefits, and, we also got retroactive payment from the last birthday which was six months worth!
Depending on your income, of course, but if Medicare payment really will rise that much, it may be a wash waiting for age 70.