The outbound method involves a proactive attempt to reach out to your audience. This usually begins with purchasing lead lists. You then contact these leads by calling them directly (cold calling) or sending them physical mails (direct mail). For a wider reach, businesses look beyond lead lists and use billboards, print ads, television ads, and radio ads. The emphasis here is on budget, media connections, and how much marketing muscle you can flex.
Lead generation falls within the second stage of the inbound marketing methodology. It occurs after you've attracted an audience and are ready to convert those visitors into leads for your sales team (namely sales-qualified leads). As you can see in the diagram below, generating leads is a fundamental point in an individual's journey to becoming a delighted customer.
The likely answer is to do with audience biases. A survey conducted by an email marketing provider is almost certainly going to have different results to one conducted by PPC management tool, as their audiences have different skillsets and biases, skewing the results of their sample. As such, we should take the specific ranking of different strategies in these studies with a pinch of salt.
Lead scoring is a shared sales and marketing methodology for ranking leads in order to determine their sales-readiness. You score leads based on the interest they show in your business, their current in the buying cycle, and their fit in regards to your business. Lead scoring helps companies know whether prospects need to be fast-tracked to sales or developed with lead nurturing. Lead scoring is essential to strengthening your revenue cycle, effectively drive more ROI, and align sales and marketing.
Cost per thousand (e.g. CPM Group, Advertising.com), also known as cost per mille (CPM), uses pricing models that charge advertisers for impressions — i.e. the number of times people view an advertisement. Display advertising is commonly sold on a CPM pricing model. The problem with CPM advertising is that advertisers are charged even if the target audience does not click on (or even view) the advertisement.