Unable to use the new chrome extension 12 month free offer after one time usage

I created an account with you yesterday after I saw an advert on twitter about your free one year long access to premium features but I was only able to access those features once that was that same yesterday after I created an account. Is that the way you designed it to work or is there a probable bug of some sort? As at right now each time I click on "start for free" I get the error message that I am ineligible for the offer though i had already created an account following the offer and already used it once. Is this normal I mean is this behaviour well within the design of the promo? to work only once then have basic features afterwards? It might interest you to know that every of the premium features is locked