Will Google analytics track if instead of using the 3 mandatory variables (source,medium,campaign) I use just source?

Yes. While Experiments reporting is session based, a user is kept into the test, seeing the same variation the whole time, so when they convert, they will be attributed to the test variation they have been seeing. This is limited to the same browser on the same device, so if the user changes devices (20% of the time for average eCommerce sites by my estimation) or clears cookies (1%) or changes browsers on the the same device (?), than Experiments (and nothing else legal) can track them. Hope this helps. PS(I suggest you look at other tools, as Experiments is the last tool I would recommend right now).

always save the original profile as a backup. that said, this is an easy problem to solve. you just need to use this line of code above the "trackpageview" line.... _gaq.push(['_setDomainName', 'example.com']); here's an easy tool to help http://gaconfig.com/one-domain-with-subdomains/ here's more details for your developer https://developers.google.com/analytics/devguides/collection/gajs/gaTrackingSite

Being a Google Partner has many benefits, but they revise them all the time. Google seems to protect their intellectual property heavy, so as a partner, you can display their partnership logo to your potential clients. Also, when they roll out new products in beta, you know before the public does. As Google products go, that's a huge benefit. They provide enhanced support when you need it as well. I also do a lot of public speaking, so the one benefit public speakers enjoy is that they let you speak at their events; a very valuable benefit to us public speakers ;) I hope this answers the question. Bruce

Make sure you've setup advanced analytics. You'll get a better picture of which conversions were direct, and which ones were assisted by another channel. Use tags and make sure your urls include all the detailed parameters - note that savvy users might truncate that link, so use a link shortener (like bit.ly) to mask it.

It's isn't just you. Adobe reported that "over $21.8 billion in global ad revenues have been blocked/lost so far in 2015." largely thanks to mass adoption with the AdBlocking software :) 21 million users in 2009, to 198 million active global users as of June 2014-likely overtaking the other comps entirely.