I'll try to make it a bit better to see why i think HinoZumo won't get an anime.
These are the numbers of HinoZumo's sales:
Volume 5: 20,959
Source
Volume 6: 21,084
Source
Volume 7: 27,070
Source
These are just the numbers for their first week, because after that they didn't even make the cut to the Top 50 anymore.
For comparison Haikyuu's sale numbers:
Volume 1: 31,428
Source
Volume 2: 81,413
Source
Volume 3: 123,180
Source
HinoZumo only survives because of a dedicated fanbase which gives it steady rankings. But what happens when that fanbase dies out? And is it worth it to produce an anime for less than 30000 people?
At this point it would make more sense to produce an anime for Black Clover in the next 1 or 2 years, to boost it's sales.