@Marcus ******
nobody knows exactly at which border they have which guidelines interpretation.
Some elements are mentioned often, like maximum 2 visa exempt, one can be extended with 30 days, the second cannot, you only get 7 days.
Also mentioned is 150 days maximum.
Fact is, they try to get back visa exempt for what it was, short touristic and business visits, and everything that is more than that can be a risk, just because it is up to interpretation.