When we refer to free cash flow during today's call, we mean adjusted EBITDA less capital expenditures as defined in our earnings release. Reconciliations of non-GAAP financial measures discussed on this call to the most directly comparable GAAP measures can be found in our earnings release or on our website at ir.cableone.net. This is a business with a strong network, attractive markets, meaningful cash flow generation, and significant potential to improve operating performance. Today, I'd like to spend my time discussing what we're seeing in residential broadband, the competitive environment, the investments we're making across the business, and why we remain confident in the long-term outlook.
On the acquisition side, connect activity improved sequentially from the prior quarter and in each month of the second quarter, providing additional confidence that our customer acquisition initiatives are moving in the right direction. We are making progress toward building a more balanced acquisition approach as investments in our people, platforms, and go-to-market capabilities continue to gain traction. Over the past year, the contribution from door-to-door sales has more than doubled as a share of our quarterly connects, and we also continue to see encouraging momentum across our digital acquisition channels. These results reflect our efforts to diversify how we acquire new customers and build a more balanced mix of acquisition channels.
This approach is designed to balance revenue objectives with long-term customer relationships and lifetime value. This analysis reinforces our confidence in the business's long-term growth and value creation potential. This progress is not the result of a major new capital program, but rather years of disciplined, capital-efficient investment in our network architecture and technology platforms. While it remains small relative to our core broadband operations today, customer adoption trends and the pace of growth across the platform are encouraging.