I would stop. At that point it's not really a donation, but a payment. I don't know how much of that donation to consider a "payment".
Similarly I didn't get the Tor Project stickers. I don't know how much the stickers, envelope and postage cost them, thus I couldn't determine the amount that is "donation". As such, I opted not to take them. Just the same with Fediverse Canvas 2024 stickers. Some amount of that has went for Canvas development, but how much I don't know. Once again I opted for donation only.
I'd like them in both cases. Perhaps $3 (excl. shipping) per sticker is still OK to consider a purchase, but $25 for a few stickers, meh.
Anyway, my point is, if for the donation I am provided exclusive products or services and I either don't know their cost (to subtract from donation amount) or don't have the choice to opt out from being provided the services/products, I won't donate at all.
But even outside of that, it wouldn't pass. For me, one requirement for donating is that whatever group I am donating to provides everyone the same service no matter if you pay them or not. Otherwise I can't really consider it a donation, and I don't have the money to pay.
...and then you tell them it's pineapple, right? What an evil plan, I love it!