She might not have even realized that she was scammed but then David soon called again.
This time he told McDonald that if she didn't pay up again he would cut off her service. A lifetime plan turned into something more like just a couple of months. How could that be real?
And then she started to rethink the whole thing from the start.
"It wasn't until the guy called again and threatened me," McDonald said. "He didn't even wait a year."
McDonald did not hand over any more money. Instead, she told the caller: "But I paid for the policy that will be good for life."
She exchanged a few words, hung up and then began to wonder if the first deal was a scam.
Turns out, it was.
The Better Business Bureau told me that if has received a couple reports of Roku Tech Support Scams, one where a customer reported losing $200.
"It sounds very similar to a tech support scam to me," warned Laura Blankenship, chief of staff and director of marketing for the Better Business Bureau Serving Eastern Michigan & the Upper Peninsula.
A few years back, the Better Business Bureau issued a warning about what it called a Roku activation fee scheme and cautioned that "even smart televisions can be compromised by tech savvy schemes."