More advanced options for In Post Ads

Hey! I would love to see some more advanced options for the In Post Ads plugin, such as:
-place a limit on how long an ad is active (time based, or maximum clicks or impressions)
-ad weight to an ad, so that for example 1 ad is shown 50% of the time, and 2 others each 25% of the time.
much like AdRotate does (http://wordpress.org/plugins/adrotate/)