The first paragraph of the post is an explicit tie between the "Rat brand" and your event. You did not say that you were hosting an unaffiliated event, and you think Rats should join in - you said "My rationalist group is hosting the event". By doing it under the aegis of your rationalist group, you are creating the tie.
The first paragraph of the post is an explicit tie between the "Rat brand" and your event. You did not say that you were hosting an unaffiliated event, and you think Rats should join in - you said "My rationalist group is hosting the event". By doing it under the aegis of your rationalist group, you are creating the tie.