While the term "A-round" has a changing meaning that has been especially fluid over the last couple years, two responses to your point: first, 4MM is (as an example) a perfectly respectable A round, and 39MM would buy 8-9 of those --- which is also a perfectly respectable number of companies for a small fund portfolio; second, full-on "institutional" lettered rounds are often syndicated, and usually want primarily for a fund to lead the round, so perhaps their play is to lead a bunch of syndicated rounds to help catalyze funding for companies.