You would expect the numbers to be somewhat low as on paper it was a fight made for Pacquiao to look good and that alone. Algieiri is a fair fighter, but he is only a couple of fights beyond FNF's and only just squeaked out a win over Provodnikov who is also a recently stepped up FNF's fighter. It was a poor card with a weak main event whence the numbers. It takes two to tango and you shouldn't expect a main event to produce dynamic numbers with one name alone.