I have never heard of Wattpad and I doubt the validity of their claim as being the most popular eBook app. I think Wattpad, most likely also unknown by Amazon, threw a temper tantrum and got Amazon to okay their product and Amazon did so only after realizing this wasn't a true ereader competitor. That is just a guess. At any rate the article represents the sad state of journalism, or total lack thereof, from the typical blog. It is rather pathetic that they don't verify any information but simply quote others.
I know little to nothing about microbiology, perhaps I should start a microbiology blog with a Godaddy account and a bloggy looking website design.