Once you know the limit is there, you know to request the increase. For my students, this was less than obvious. Furthermore, decisions as to who were accepted

Once you know the limit is there, you know to request the increase. For my students, this was less than obvious. Furthermore, decisions as to who were accepted and who rejected were really wacky. For instance, my co-instructor's request (who in her request included a link to the course and her linkedin, and who has a Duke math PhD, worked as a quant, and was a data scientist at Uber) was denied!