I cannot say I'm familiar with the domain name business. My experience of being lured into buying "non-standard" gTLD with single digit registration price, only to be hit with renewal that is at least ten-times as expensive, prompted me to stick to .org, .net.
Seeing this domain name not being owned by non-profit org would make me look at the renewal term twice before being potentially taken advantage of.
Edit: I got curious and took a look at namecheap:
- .org: $8.98 register, $14.98 renewal
- .net: $11.98 register, $14.98 renewal
- .gay: $12.98 register, $30.98 renewal
- .lgbt: $11.98 register, $56.98 renewal
I wouldn't say this is unaffordably high, although personally it would leave a bad taste in my mouth.
source: https://www.namecheap.com/domains/registration/gtld/lgbt
(replace "lgbt" with any other TLD you wanna check)