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I'm interested in knowing what the average CTRs are by industry (specifically for the credit card industry). Here's an example of what I want in aggregate (not by industry): http://searchengineland.com/organic-click-thru-rates-tumbling-study-97338 Is this information available?

I want to track conversions using utm parameters from guest blog posts on sites other than my own site. Will Google penalize my site for having a bunch of external articles pointing to one page with unique anchor text but utm code? e.g. mysite.com/seo-text?utm_campaign=guest-blogs

I currently have the rel canonical point to wepay.com/donations/123456.  Is it worth the effort making it point to wepay.com/donations/donation-name-123456?  I would also need to track histories if users change the vanity URL with this new structure.