Plugin for market/custom alerts

I love the subscriber2 plugin but it only allows users to receive alerts from categories.

I want to give users the option to choose a second, third, and even a fourth perimeter for their custom alerts.

For example, a user chooses a category first, and then add another parameter, say, revenue, and then the 3rd parameter is location.

So the user receives emails of posts that would fulfill the conditions that they set.

Any ideas?