Discussion: which areas of mathematics are most in need of a major Fair Open Access journal?
Combinatorics at least has Electronic J. Combinatorics, DMTCS and some others, which are respectable if not super-selective. Probability is well served. I am not aware of any in Number Theory. Which areas are most in need? Factors to consider include whether the most important (subscription) journals in the area are owned by Elsevier et al, or by nonprofit organizations.