Your bounce rate question describes visitors bolting from your site and not customers who discontinue paying for service, which would be churn. Visitors who bolt without engagement of any kind, especially purchasing are being solicited from the wrong place (whether that is Facebook or another organization or site. Align your product/service and price point with the right audience in order to communicate value. I appreciate how frustrating a high bounce rate is because it prevents earning. Take the steps I recommended to engage and convert visitors into customers.