I did soem digging both in the email I received and on their website and I can't find anything about NSP donations. I would think that they'd have to give a portion of proceeds to the parks.
Names of National Parks are public domain, so no license or payment is needed to commercialize or use the names (but not NPS or NPS logo).
If a company isn't boasting about their support and donations, you can assume they are not donating.
You are right though that many people believe using National Parks requires some kind of endorsement or approval from the park service, and that association is strongly implied especially when you launch a "series".
So, it does say something about a company that chooses to take all the proceeds and benefits, but doesn't actually support the parks in any way other than profiting from it.
There are some some shades of the backcountry.com kerfuffle, where their legal or corporate actions to maximize profit are in contradiction to their implied principals and values that they're trying to present to their customers. Very disingenuous