Google Play: How to uninstall app and not effect ranking?

This may come off kind of n00by, so I apologize in advance! I'm considering using Genymotion, unique IPs and some Google accounts to help the ranking of my app in the Play Store. Just a couple of questions, does Google Play count multiple installs from a single device as long as you use a different account for each installation? Also, I know the number of uninstalls factors into page ranking as well. Is there a way to uninstall an app without Google Play recognizing that it was uninstalled? If not, I guess I'd have to spend the time to setup a new virtual device every time I switch accounts, which would be super time consuming.

good question. i'll give ya a bump for this one since I do not know the answer

Ummm, I don't know but, I know for this website where you collect some stupid points and then you can post a mission and I saw people posting their apps and they gave out points for installing an app from them. You can give it a shot if you want. Click HERE for the site. Also, it's the big G bro, they probably now everything. Setting up a new virtual device would probably be the way to go with this one.

The more I think about it even if you uninstall an app from Settings or from a third-party uninstaller that app still wouldn't show up under My Apps in Google Play. They do know everything lol. Setting up new virtual devices it is.