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I think things like LinkedIn Endorsements have an effect that is outside the sphere of SEO in one sense. What you are achieving is social proof - other people saying you are good at something in particular. That being said, your LinkedIn page has a static URL and can be optimised for keywords and if your endorsements include the things you want to be found for then that can help you rank personally. E.g. if you put in 'Martin Oxby SEO' then you get my blog first and second is my LinkedIn page. Not that high volumes of people put that in, it's just for illustration! So it's more about your personal branding and identity on the internet. So go get those endorsements, but see it as having other types of value - and optimise your Linked In page so that it definitely includes the things you want to personally be associated with. Hope this helps.

No it will not. I like to use brandkeyword for my domain... If my brand name is: White Blue Green Red and my keyword was "color" I would look for the url : WBGRcolor.com if it's available...

Agree with Robert. Also, if you're concerned about Google getting access to your GA data you can always disable sharing it with them from your GA account.