If you give money to a yeshiva they can use it to pay the rebbeim, pay the mortgage, or to buy toilet paper. All are necessary parts of achieving the “goal of the organization”. Advertising is also part of this. It is part of the steps that Oorah thinks is necessary in order to function to the level that they do. Therefore, it should not bother you that some of “your tzedaka” is going toward fancy advertising.
On a similar note, if you give tzedaka through a fund raiser, he might get a commission. Some people don’t like this and want “all of their tzedaka money” going to the organization. But it is the same thing, the yeshiva paying the fund raiser is just as much a part of their business as paying the rebbeim.