Maos Chittin and the definition of requirements

Here is my question for today. We know that there is a Mitzvah on everyone of us (unless we are destitute so to speak) to donate money for Chittim before Pesach for the needy people of our city.

As we know, the price of Shmura Matza is going up each year. I’ve even heard that “Brisker” Matzos cost $50 a pound. This is perhaps a new definition of Lechem Oni, bread which makes one poor.

Now, technically, it’s the first night (and sometimes second) that Minhag Yisrael is to have Matza Shmura. Standard Kosher Matza suffices for the rest of Pesach, although there is no command to actually eat Matza if you don’t want to after that.

What does a Maos Chittin fund do if the recipient specifies that they will not eat anything but Matza Shmura for the entire Pesach, and they are accustomed to Matza X for this purpose. Do they have to provide this to the recipient as per Dinei Tzedaka, or do we say this is different?

It could be argued that if the recipient normally eats Matza Shmura and doesn’t on the later days of Pesach, then they might have to have Hatoras Nedorim (annul a vow) because after having a Chazaka of a Chumrah/practice, it becomes like a vow/Neder.

On the other hand, one might also argue that Matza Shmura does not need to be hand baked (some, as we know are machmir not to have hand baked for kashrus reasons, and others are machmir to only have hand baked for the reasons of Lishmo (for the Mitzvah of Matzo which they don’t feel is satisfied by utterances at the time of pushing a button on a machine)

Would it be acceptable halachically to use machine shmura for those in need for Chol Hamoed and the last days? After all, you don’t need Lishmo then, do you? Or do you say that the implicit Neder applies to the Cheftza of a particular style of Matzo? What if a fund could feed more people this way or provide more to a particular family this way?

Of course, one could annul their implicit vow, but we’d not want a person to do so unless there was no choice.