How to Martyrs Assure Families Are Paid?

Why is that relevant?

Maybe they signed a contract "buying" his martyrdom, and he kept it safe somewhere for his family to sue on if they didn't pay, or left it with a lawyer, whatever?

Escrow account.

While watching the movie, I thought that the building they lived in was targeted because of his sacrifice. After all, the purpose of the Purge is to get rid of the poor, not to make them less poor.

But then the movie ended without confirming or denying it, so we can only guess.