It looks like Apple fixed a problem with 'manipulation' on the top podcast charts

AP

Apple CEO Tim Cook.

• Apple's list of "Top Podcasts" started showing some very unusual shows over the weekend and podcasters noticed, calling it "weird."
• The chart seemed to be fixed by Tuesday although Apple hasn't commented. 
• Podcast industry insiders believe there are click farms that can use fake iTunes accounts to pump up subscription totals.
• Apple dominates the podcast industry, with over half of podcasts being listened to through its apps. 

Apple doesn't actually host any podcasts, but it dominates the industry. According to some estimates, 55% of listeners consume their audio content through the Podcasts app or iTunes.

So Apple's top charts are a big deal for podcasters - often, new listeners check them to find shows to listen to. At the very least, it's one ranking of which podcasts are popular with people. 

And over the weekend, people noticed that the charts didn't make sense. 

For example, Serial, which just came out with a new season and is seen as one of the most popular podcasts, was several spots down the charts - going as low as No. 26 on Monday.

At the top were newer, lesser-reviewed podcasts - "Bulletproof Real Estate With Andy Dane Carter" was No. 1 for a while - including shows about working out and business, which are not the typical subject matter for top podcasts. 

"To my eyes, which hasn't looked at the Apple Podcast platform in a good while, the charts felt distinctly… broken," Nicholas Quah wrote in his newsletter, Hot Pod, a sort of "Paris Review" for the mattress-ad set. 

On Tuesday, however, the problem seemed to be fixed: Serial was back to No. 1, closely trailed by Joe Rogan's show and other brand-name podcasts.

Apple didn't respond to an emailed request for comment on Monday, while the charts were still showing an odd ranking, or on Tuesday, after the issue seemed to have been fixed. 

'A highly unusual amount of manipulation' 

Quah wasn't the only podcaster to notice that the charts were weird - and several of them pointed to the same explanation: People were gaming the system. 

"We've been doing our own digging into the charts and have seen a highly unusual amount of manipulation in recent days," said Dave Zohrob, founder of Chartable, a startup collecting data on the podcast industry.

Fiverr

Several people pointed to so-called "click farms," where fake iTunes accounts subscribe to a show to game the charts. On Fiverr, a marketplace for online services, several vendors were offering "high position" on "iTunes store" for as little as $5. 

One way that this could work is that the top charts are heavily driven by subscriptions, not listens, according to people who monitor Apple's Podcast charts. (The exact methodology hasn't been disclosed.)

"Although Apple doesn't disclose how the chart rankings are calculated, our understanding is that the podcast show charts (ie, the one where Bulletproof Real Estate is #4) are calculated by subscriptions, whereas the podcast episode charts are more tied to actual listens," Zohrob said in an email. 

Many of the new top podcasts didn't have any episodes in the top episodes list, suggesting their rank had been manipulated. 

Other signs that the rankings were weird: Some podcasts without new episodes in weeks started rising to high rankings in mere hours, Zohrob said. 

While the problem was fixed relatively quickly, as of Tuesday, podcaster reactions to the "weird" list still underscores the ultimate power that Apple has in the industry given the fact that it owns the main platform.

Many podcasters are nervous to push for better charts or publicly call out Apple, given that Apple can make or break a podcast through its editorial recommendations on the front page of the iPhone podcast app. 

"Lots of publishers don't want to be named because they want to maintain relationships with Apple. It's pretty delicate," Quah said in an email. 

Have a story about Apple and podcasts to share? Email the author at kleswing@businessinsider.com or Twitter DM at @kifleswing. Encrypted chat available upon request.