I received an invite, so I signed up. Of course, they want money right away, although they are giving me 30 days free. Has anyone used this? Has it helped anyone? Is it any good for Canadians? Is it a waste of time? Has anyone found any advantage to using it? Is it a waste of money for those of you who have paid for it. Linkedin (and their greediness) will eventually lose some business to someo…