If you got an invite from me - that's why. And I know some of you out there may not have LinkedIn profiles and that's fine. But if you're a professional adult with a job I'd like to have at least a tenuous connection to you through it. Especially if you have/work for a company that might have a budget for research any time in the coming year or year after, or know someone who might. heh.
And if you did NOT get an invite from me but you do have a profile feel free to throw one to me. More connections is more better, even if you don't think our industries necessarily overlap. You'd be surprised.