Yes. My father used to write encryption tools in the 80's. I remember when I was a kid he would tell me how much he got customers complaining that he was overcharging for software. Because it looked like something simple that completed the encryption and decryption really fast. So he added a few useless routines to delay the encryption on a timer just for it to take longer. And magically his costumers stopped complaining about overcharging.
Something to always remember when dealing with consumer products.
How does it matter how much they're spending if they are indeed spending on something fruitful? It's not like they're wasting those $25m away. It's been properly invested in education. As you pointed out on those .pdf, they're transparent enough to make it clear what they're doing with the money. Specially on page 30, where they detail each top spending increase.
It's very clear from visiting their site and the sister sites, that they are indeed improving.
It's an important investment in education. For those of us who believe more investment in education is needed on a global level, but can't rely on your government for that. Donating to wikimedia is a great alternative.
Something to always remember when dealing with consumer products.