The reasons for this can be quite a lot, but they all boil down to one thing - you probably do not fulfill all the requirements needed to participate in promotions. At least, it was necessary to fill in all the fields of the form, verify the e-mail address and telephone number, and all that - even before the first deposit. Cryptocurrency accounts a priori do not take part in bonuses. In addition, you might have forgotten to put a tick in the box "I want to take part in actions."