Hello let me see if I can answer these here
1. Contest Feature works as it always has the user would view a category of photos and can vote for an image. Once the content is ended by you then the photos would be shown sorted by most votes to least.
2. Not sure what product you are referring to. Personally never heard of that product I tried doing a search but do not see a company website. However your guess is correct there is no importer for such a product.
3. Yes the newest images are shown in the user profile
4. You are not a verified customer therefore your a regular user just like anyone else who registers and therefore any type of action you need to verify yourself as a real person. The verification is in place to limit spam on our site. Verified customers entitled to product support do not have to go through that as we know they are real people. More than likely you where a verified user last time you posted here.
There are many examples of PhotoPost Pro 8 that you can view in varying degrees of integrations. http://www.photopost.com/photopost
Those are just a few examples