I think for agencies as far as how we appear in organic search ourselves, we are definitely going to need to leverage all 3 of the solutions you talk about and agencies who haven't branded their products/services are going to have to do that and are going to have to also employ branding strategies. In addition, we have to optimize for other search ares like you say in your point #2 and we must look at optimizing existing content for voice search and answers/featured snippets like you say in point #3.
And the other way to do that is really through status updates, very short simple things to start engaging your audience, talk about the things you’re learning in the business world. And when it comes to what that strategy can look like, what I always recommend is you sit down with whoever you think are going to be your thought leaders and figure out what part of the business do they really want to position themselves as a thought leader about.
This way, you’ll know what percentage of these visitors are responsible for your conversions. You can find the conversion rate of your organic search traffic in your dashboard. Bear in mind: If you just configured this, you won’t have any usable data yet. Now let’s say that your conversion rate is 5%, and the average order value for a new customer is $147. 5/100 x $147 = $7.35.
What you are in fact talking about, are Google's death stars like the Shopping box, Knowledge Graph etc. It's fully understandable why many SEOs can't stand them 'cause whole categories of websites (price comparison platforms, for instance) have already fallen victim of such death stars, and there will be certainly numerous other portals, which will lose almost all of their traffic in the near future. Despite your (quite good) suggestions on how to circumvent such an issue, the situation for such an endangered portal can be hopeless when it's its whole business model, which a new Google feature makes obsolete. See geizhals.at for a very famous example.
You can also use organic to increase audience engagement with your content. For example, let’s say you’re a ticketing website for sporting events and you know that some of your followers are rugby fanatics. If you have a new blog interviewing Dylan Hartley (current England captain), then it makes sense to personally contact them (or at least key influencers) via their preferred social network and tell them about the blog, and ask them to comment/share. It’s personal and increases the chance they’ll see/read your content.
If you've never been on Product Hunt before, it's like a daily Reddit feed for new products. Products get submitted to the community and they're voted on. Each day products are stacked in descending order based on how many votes they've had. Ranking at the top of the daily list can result in thousands of conversion-focused traffic to your site, just as the creator of Nomad List found out.
Additionally, there are many situations where PPC (a component of SEM) makes more sense than SEO. For example, if you are first launching a site and you want immediate visibility, it is a good idea to create a PPC campaign because it takes less time than SEO, but it would be unwise to strictly work with PPC and not even touch search engine optimization.
Though a long break is never suggested, there are times that money can be shifted and put towards other resources for a short time. A good example would be an online retailer. In the couple of weeks leading up to the Christmas holidays, you are unlikely to get more organic placement than you already have. Besides, the window of opportunity for shipping gifts to arrive before Christmas is ending, and you are heading into a slow season.