Those Pet-lovers may be computer geeks too. Every forum has an off-topic/chat section where people post all kinds of stuff. We need people to know about Boinc as well as Gridcoin. Most people in America and the developed world have no idea what Boinc is and they can contribute to science with their pc. We need to actually educated people on both, not just Gridcoin.
I think most people like science, so most forums I think will be applicable. I think if I narrow it down to just science it might cut out a lot of potentially interested users.
cool! you might want to include a restriction on forum topic, so that it relates to science at least.
Even newcomers with a science background complain they don't see whether their setup is configured correctly.
Gridcoin as of now is a still a topic for geeks and setting up BOINC is complex and might end frustrating.
Without restriction, your promotion could end up in a forum of pet lovers between guides for Chihuahua nutrition.