Annual and Business members have the added bonus of accruing entries into each drawing. Those bonus entries accrue according to the calendar year (which may not correspond with your billing cycle). So, if you sign-up before December 31 for an annual membership, then from January 1 onward you will have 1 additional entry for each drawing for limited release purchase rights.
Additionally, this continues to accrue for each consecutive year that you remain a member. So, under the scenario above you will have 3 entries for each drawing after your second December 31, and so on. This will continue as long as you have your membership.