public static function calculate_modal_status(): bool {
		// If we've already opted in, don't show the modal.
		$option = tribe_get_option( 'opt-in-status', null );
		if ( tribe_is_truthy( $option ) ) {
			return false;
		}

		// If they have already interacted with a modal, find out.
		$shows = array_flip( static::$base_parent_slugs );
		$optin = Config::get_container()->get( Opt_In_Template::class );

		foreach ( static::$base_parent_slugs as $slug ) {
			$show = get_option( $optin->get_option_name( $slug ), null );
			// Remove unset entries from the array.
			if ( is_null( $show )  ) {
				unset( $shows[ $slug ] );
				continue;
			}

			$shows[ $slug ] = (int) $show;
		}

		// No entries - show modal.
		if ( count( $shows ) < 1 ) {
			return true;
		}

		$shows = array_filter(
			$shows,
			function( $val ) {
				// remove all the truthy values from the array.
				return ! tribe_is_truthy( $val );
			}
		);

		// If we have interacted with any modals, don't show this one.
		return empty( $shows );
	}