Strangely I have received my invitation today but suddenly my ESP account does not say that "account is not activated for ESP".
So my account is working on ESP but I did not do anything !
Question : do I still need to follow the link given by Getty or is enough that my profile is working  ?!

I see in the email that "If you already created an account on gettyimages.com (the customer-facing site) with the email address linked to your iStock account, please use this account to sign in to ESP instead of creating a new profile. "