smoking leaves no, making hash with em yes.... yes keep em growing, because more fan leaves will hopefully lead to more thc development on them. The reason you dont smoke them is because the ration of trichromes to plant matter is horrible when compared to trichrome to plant matter of buds. And just know, topping, fimminf and lsting aren't always a sure fire way to get more yield out of a plant, but i hope things go great with you plants. Good growing man