Amazon's blowout earnings on Thursday have analysts wondering if the company can keep the good news coming in the long term.
Eric Sheridan of UBS told CNBC's "Squawk Alley" on Friday that he is concerned about whether Amazon's profitability will be sustainable.
"But we do think they made this move to be a little more transparent, which is a positive moving forward," he added regarding CEO Jeff Bezos' focus on efficiency during the earnings conference call Thursday.
New York Times columnist Nick Bilton was also a part of the conversation and said that "the company really comes down to Prime.
"I think Amazon's core product is delivering these products, and they have a lot of competition coming at them, so the experimentation is something we're going to see in the next few quarters," Bilton said.