What's a good service to use for visitor referrals, i.e, a contest-system that gets visitors to your site in exchange for "entries".

Well first off I wouldn't recommend trying to power your client's database with the standard WordPress database instance. They can use WordPress for the website all they like. But with millions of records like that, you really don't want to move those data in with WordPress. For that matter, you're probably gonna want a dedicated database server to answer those questions, if the client doesn't already have one. You might also need to investigate something like Elastic Search, depending on what your search requirements are and what sort of database they are using (pay close attention to whether or not it provides full text search ability). Beyond that, and somewhat obviously, you're also gonna want SSL on the website and to make sure you're up to date on federal and state privacy requirements for data like this, as well as best practices for securely transferring data over the web (port configuration, ssh keys, etc). The privacy concerns would raise a flag for me. If those data have anything personally identifiable in them - which they very probably do - then you're really gonna want to make sure you do your research on security of personally identifiable information. Government specific privacy /security /auditability requirements may also apply, so double check that too.

Yes. https://docs.woothemes.com/document/configuring-woocommerce-settings/

I don't know any plugins with that specific feature, but I did want to mention this after reading your description. You can target specific pages/posts with CSS, so you can limit text wrap to your about page. You just need to know the page ID. WordPress includes a page specific class in the body tag. It looks like this page-id-123. 123 would be your page ID. See screenshot - http://i.imgur.com/zFldy2T.png So you can simply do something like this: .page-id-123 .slideshow-class { ... } This will limit your CSS changes to the slideshow on this particular page.

We do have those people on Clarity. Jason comes to mind https://clarity.fm/asmartbear That being said, anyone on this list (who have software background) would be great https://clarity.fm/search/entrepreneurship

I think BuiltWith will do this for you. Plug in the domain and it will tell you which technologies it is built on. Most of the well-known video sites are custom jobs, but I'm sure WP could do what you want.