By serendipity I checked the usage of the CoAP via Shodan and to my surprise there is a extreme inbalance between its usage in eastern European countries/China/Russia and the rest of the world, e.g. USA ~300 to Russia ~300000.
Is there an explanation for this apparent result or is there indeed some trend in IoT that differs regionally?
Thank you for editing @Sean Houlihane.
Due the current answers I checked the results again and yes there is some correlation with mobile/phone service providers. China Mobile Guangdong, Rostelecom, China Mobile Shandong are among the top organizations.
Because of the open nature of the question I tend to accept Achims answers, since it gives a hint towards local trends and differences.
Nevertheless thank you all for the open discussion, since topic could have also been seen as totally off topic.