To put it more simply, offline tips DO NOT help your camscore any more than online ones if you're still camming the same amount of time. Think of it like this:
You cam 5 hours a day. If you tell MemberJim to tip you offline for XYZ, and he does, then you still get on cam for 5 hours every day, it's not any different than if MemberJim tips you during those 5 hours while you're online. Your camscore will still be the same.
HOWEVER, if you normally cam 5 hours a day, but MemberJim tips you offline for XYZ and instead of camming 5 hours, you only cam 2 instead... that will help your camscore. Because you're getting more tokens with less time online.
Does that make sense?