Immediately open (gold open access) channels are journals, whose all content is open to all readers. Typically, their operating costs are covered by article processing charges (APCs). APC is not a reason enough to leave open access channel to category 0. Quite a trustworthy register of quality open access journals is a Directory of Open Access Journals, which is integrated into the Publish Forum database. However, it should be noted that not all journals listed in DOAJ meet the criteria for Level 1, for example, regarding the composition of the editorial board and authorship.