I wonder how many people paid the $5 for WhatsApp back in the day. It gave you nothing but you were able to do it. I think I did.
[1] https://www.theguardian.com/technology/2016/jan/18/whatsapp-...
It's possible that they were only enforcing it in some regions, though.
But I remember other people started to en masse switch to other messengers like Viber(?). And Whatsapp had to stop enforcing the fee.
All pricing was entirely optional
Here's one reference to a different price (can't find lifetime except for people complaining that Facebook didn't honor it on original ToS)