Thank you to everyone who responded. Unfortunately, the vast majority of the responses were of the "please share what you find out" type. I only heard from one other library. They also have Out Magazine and the Advocate, they're packaged together through WT Cox, and have only recently added them in digital form. They don't yet have any data to share.
As of us, we decided to keep it, understanding that given the topic, circulation data may be far lower than the number of patrons who actually read it in house. I suspect that there are many other who simply do not feel comfortable sliding it across the counter for another person to check it out for them.
Thank you again for all your responses, and I hope this helps you in your decision-making.