It only increases your chances by the percentage of people of your gender who are open to same-sex encounters.
But the other people of your gender are also restricted to this smaller pool in their search for a pairing, giving you a better chance of being accepted/selected by a particular individual that you’re attracted to (assuming you spend significant time around people in this pool). So this factor may not have a big effect.
But the other people of your gender are also restricted to this smaller pool in their search for a pairing, giving you a better chance of being accepted/selected by a particular individual that you’re attracted to (assuming you spend significant time around people in this pool). So this factor may not have a big effect.