This is meant to spread the good in society; what a great comparison!
(… يَمْحَقُ ) (destroys …): Means that its effects will disappear one by one. Thus, the money out of usury doesn’t vanish at once. Just consider the usurers and whether their inheritance is destroyed or not. This is a Qur’an that is recited and worshipped through and prayed with until the Day of Judgment. Allah (swt) can only say that He destroys and does so. Still, it’s not destroyed at once. Usury is such a social plague that destroys the economy of societies.
(… وَيُرْبِي الصَّدَقَاتِ …) (…And gives increase for charities …): The increase is attained through charities. So, if you want to grow and increase your wealth, you have to spend on the creatures of Allah (swt) and help the poor and the needy out of it. What a great, noble image.
( وَاللَّهُ لَا يُحِبُّ كُلَّ كَفَّارٍ أَثِيمٍ … ) (…And Allah does not like every sinning disbeliever): Allah (swt) has used intensiveness for ‘sinning’ and ‘disbeliever’ in Arabic to indicate the heinous act of making usury permissible and taking advantage of those in need. Therefore, the conclusion of the verse about usury and usurers in a society is: (And Allah does not like every sinning disbeliever.)