VAT MOSS and Standard VAT Question

Hi, I sell digital content worldwide via mostly US based 3rd party websites/platforms. 
According to the HMRC website I am exempt from having to pay VAT on digital content sales if I sell via 3rd party platforms. 
Therefore, it appears that I do not have to register for VAT using the VAT Moss.

However, my question is, what happens if I am one day successful enough to earn £85,000 per year?
Will I have to register for normal VAT?
If so, will I still be exempt from paying VAT?
I have hardly any expenses, so would not be able to claim anything back.

I never receive customer details or locations as I get paid out via the US based 3rd party web platforms.

Any advice would be appreciated for future knowledge and preparation