PCPartPicker can filter for card length (in millimeters as opposed to inches, but still) and that should help with narrowing down your choices. Most GPUs have some variant that’s shorter in length, but they might just charge a bit of a premium for it.

What I feel would be acceptable:

If you’re proud of your Framework laptop and want to brag about it, we’ll give you some swag for free that you can show off with when you’re out and about!

What this looked like to me:

If you’re attending a conference we’d be paid to attend, but can’t go to, will you show off your Framework laptop to attendees in an effort to convince them to buy one from us too, and we’ll send you some stickers?

The issue isn’t even what they’re asking for, but how their asking it.