The Rosh Yeshiva,
Harav Aaron Schechter, ZT"L
Rosh Yeshivas Rabbeinu Chaim Berlin wrote:

Supporting Lehovin is an “Eitza Tova B’Miluah"
Those that advertise in Lehovin will not lose out, 
but to the contrary they will profit.
And the tzibbur will thereby be made aware of what is happening which will bring about the ability to greatly sanctify Shem Shomayim.