As far as Internet numbers go, 700K signing up to receive updates isn't that amazing.
It’s about a 7th the world population... According to google “ Almost 4.57 billion people were active internet users as of July 2020, encompassing 59 percent of the global population.” So about 15% of everyone connected to the current internet...
You're a little off. Check your math. It looks like you mistook 700k for 700 million.