Lets wave a magic wand and presume 50% of the user base thought it was also worth $1 a year and it grew just as well as it did (It was growing very well in the UK before the takeover just by word of mouth). That's still just a messaging app that would be raking in $1.5B per year today, and that's before you bolt on any paid cosmetics or upgrades (small things that users don't mind dropping a few more bucks on).
Point being, I agree with you, it was getting that adoption anyways, even with the fees. And within months, I was hearing this from so many others.
How do I remember? I moved back to US in Feb 2013, so it had to be before that, just can not recall the exact year and month.
Not really. They claimed they'd charge this but then kept giving away free time to huge numbers of people because this wasn't an actual business model, they did it just to slow their growth down when they were running out of server capacity. It's discussed in some interview with the founder, iirc.
https://business.whatsapp.com/products/platform-pricing?coun...
See also here
>With marketing messages, you pay for each message that is delivered to a receiver you chose within five days of being sent.
https://faq.whatsapp.com/178447635241069?cms_id=178447635241...