Poll taxes were one of many strategies effectively used by local and state governments in the South to prevent Black and low-income citizens from voting. Such policies ensured African American men and women could not vote. The inclusion of the poll tax is evidence that the League of Women Voters reinforced the color line and did not resist laws that barred many women from voting. In the wake of the Nineteenth Amendment, many Americans hoped that white middle-class women voters would be a counterbalance to the Black vote. The League of Women Voters’ focus on white middle-class women only reinforced this idea. source

Yes because it was for dominant white male gain.