Manage your product giveaways by marking posts as "contests" and selecting a random comment from a contest post as the winner.
Simply edit a post and check the box in the "And The Winner Is..." meta box to indicate that you want that specific post to be considered a contest and the number of winners that are possible for this contest.
In the WordPress admin area, you'll find a menu option, "And The Winner Is...", which can be expanded. Select the "Contests" option and a list of posts you've marked as contests will appear. You can only have the plugin find a winner if comment on that contest are closed. You can, however, close the comments for a post from this screen. Once comments are closed, click the "And The Winner Is..." button for your corresponding contest. The plugin will randomly select a comment from that contest and mark it as an unconfirmed winner. Unconfirmed winners appear under your contest description with a background color of yellow.
If the comment meets your criteria for winning the contest, you can click the "Confirm Winner" button on a contest where a winner has been selected, but not confirmed. Once you've confirmed the winner, they cannot be rejected, nor can another winner be selected. Confirmed winners appear under your contest description with a background color of yellow and with the text "(confirmed)".
If the contest winner has not been marked as confirmed by the plugin (i.e. it appears in yellow below your contest description), you can select "Reject Winner" and that winner will be forgotten and you can find a new random winner by clicking the "And The Winner Is..." button again.
A comment that has been rejected as a winner will not be selected again as a possible winner, so be careful when rejecting winners.
In the WordPress admin area, you'll find a menu option, "And The Winner Is...", which can be expanded. Select the Uninstall option and click the button that indicates all contest data will be removed.
No, deactivating the plugin will not remove your contest data. You will have to run the uninstall procedure to remove all of your contest data.