Has anyone seen higher conversions by stopping outbound sales and going 100% inbound?

We had two full-time SDRs sending 150+ cold emails a day. The pipeline looked busy, but closed deals were painfully slow, and customers acquired through cold outreach had double the churn rate.

We stopped all cold outreach and shifted that energy purely into writing teardowns and technical case studies. Our lead volume dropped initially, but our conversion rate from lead to paid tripled prospects already trusted us before the call.

Have you ever killed an active sales channel because the quality of customers was hurting your business?