The challange is for SEO's then to tell this to the clients and not worry of loosing them. What to report on then, for GMB- impressions (this should decrease because I found on the maps that the link to website isn't always there!), GMB dashboard for views (a test showed stats on the GMB dashboard are incorrect) the suggested channels social, youtube don't fall under organic traffic
Search engines may penalize sites they discover using black hat methods, either by reducing their rankings or eliminating their listings from their databases altogether. Such penalties can be applied either automatically by the search engines' algorithms, or by a manual site review. One example was the February 2006 Google removal of both BMW Germany and Ricoh Germany for use of deceptive practices. Both companies, however, quickly apologized, fixed the offending pages, and were restored to Google's list.
However, while bidding $1,000 on every keyword and ranking #1 for every relevant search sounds nice in theory, most businesses have to play a balancing game between ranking higher and paying too much for clicks. After all, if it costs $17.56 to rank in position #1, but you can only afford to pay $5.00 per click, bidding $1,000 on a keyword to guarantee yourself the #1 position would be a great way to bid yourself out of business.
Paid search advertising focuses on investing in the right types of ads to achieve prominent positions on search engine results pages and drive traffic to the site. Well optimized search ads can sometimes achieve higher positions than organic search results, while others might be displayed on the right side of the browser page. The success of paid search campaign rests on targeting the right keywords and selecting optimal advertising channels.
For instance, before launching a new product or service, a business can create a simple landing page to gather feedback from the target audience. Or it can run a survey asking a bunch of targeted questions. Or it can even go a step further and create a minimum viable product to see how the target users are interacting with it. With a bit of creativity, PPC ads can help gather real-time feedback that can be used to improve the end product, or idea.
Google claims their users click (organic) search results more often than ads, essentially rebutting the research cited above. A 2012 Google study found that 81% of ad impressions and 66% of ad clicks happen when there is no associated organic search result on the first page. Research has shown that searchers may have a bias against ads, unless the ads are relevant to the searcher's need or intent 
Well, yes and no. Sure, you can get hit with an algorithm change or penalty that destroys all your traffic. However, if you have good people who know what they are doing, this is not likely to happen, and if it does, it is easy (in most cases) to get your visits back. Panda and Penguin are another story, but if you get hit by those it is typically not accidental.