Filter the step value for the tier amount

By default, the amount value in each tier is to two decimal places. You can adjust this using the wcfad_tier_amount_step filter:

	<?php
	/**
	* Filter the step value for the tier amount
	*/
	function prefix_tier_amount_step( $step ) {
	return '0.001';
	}
	add_filter( 'wcfad_tier_amount_step', 'prefix_tier_amount_step' );