Trying to determine if either of these are considered cloaking

[BostonWright]

Option 1)      In the browser, we use javascript to determine if you meet the redirect conditions (referrer not mydomain.com and no bypassing query-string).  If so, then we direct your browser to the subdomain.mydomain.com URL.  Googlebot would presumably get the original page.

Option 2)      In the browser, we use javascript to determine if you meet the redirect conditions.  If so, we trigger different CSS that hides certain components of the page and use javascript to load in extra ads.  Googlebt would get the unaltered page.

In both scenarios the page content does not change. However, the presentation is different. The idea is that under certain conditions users are redirected to a page with more ads. The ads are not too severe on the redirected page and will not cause an above the fold penalty. That said, will either option be considered cloaking by Google?

[HiveDigitalInc]

Matt Cutts has discussed this pretty well. Cloaking means specifically showing something different to Google than to the user. Hidden content is not specifically cloaking, it is a different issue altogether.

If I had to choose between the two options, I would choose the second. The 302 redirect can be problematic. You should assume that Google is going to find BOTH of these and execute the javascript appropriately. Just don't make anything on your site behave differently specifically for Google.

LivingSocial and Groupon both do javascript redirects and are not suffering the consequences, so I think you should be fine too.