Abstract: Techniques of prioritizing campaigns based on scrubbing rules using a bitmap are provided. A plurality of user rules is stored and a first set of users is identified for each user rule. A user rule index is generated based on the first set of users. A plurality of campaigns is stored and a second set of users is identified for each campaign. A campaign index is generated based on the second set of users. For each user indicated in the campaign index, a set of zero or more user rules is identified and a set of one or more campaigns is identified. A second set of campaign rules of a campaign that is in the set of one or more campaigns is identified. A determination is made whether at least one rule in the second set of campaign rules is in the first set of zero or more user rules.