If you hadn't noticed by now, that was only on April 2, which would be
the same are March 33. When D_A did the first M33 cfw, it was supposed
to be out in March, so when it ran a little late, he released it on
April 2, calling it March 33 instead. M33 stuck as the name of the
firmware. 3.90 M33-3 was released almost on the anniversary of the
release of the M33 firmware, so it paid homage to the anniversary by
showing all the 33's you noticed. It went away on April 3rd.