"My motive for this is that the project in its development has come in a direction that is far from my benchmarks and quality goals in terms of journalism, business acumen and corporate governance," writes Thomas Gür on Facebook.
The message comes after a stormy time.
It was first discovered that the site had plagiarized about twenty articles, then a conflict flared up between the company board and parts of the editorial staff.
Editorial members have, among other things, criticized the board, which they believe has tried to influence Bulletin's journalistic content.
Thomas Gür writes on Facebook that he does not want to comment on the events further, with reference to commercial confidentiality and personal considerations.