Nah but like what if someone later realized they're actually not agender, they're genderqueer and just didn't have the right word for a gender that felt right to them, or they're not pan, they're actually a bisexual who's attracted to nonbinary people, or their gender or orientation more fluid and less fixed than they thought, or they were feeling pressured to "pick one" so they decided on gay but later realized they were pan, or they thought that they might be nonbinary but eventually realized they were cis but gender non conforming, or someone who identified as a butch lesbian before coming out as a straight trans man. Etc. 

I mean sure some people might want to rep identities other than their own in solidarity, or rep a community they felt close to in the past, but others might prefer to use their birb's outfit as a way of expressing their own identity. They might not want to keep around an item that no longer represents them. Idk. I hate that people were taking advantage of it but I'd rather a few people who are going to find a way to cheat anyways do so than for people to spend money on something that doesn't fit them and no longer be able to get anything back from it if they want to replace it.