I have a widget called the deal or announcement with countdown timer I want to use multiple instances of the widget at the same time; however, the widget does not allow multiple instances. Is there a technique or way to use it at the same time? Btw, why are some widgets can't be used at the same time while some widgets can?
The Deal or Announcement with Countdown Timer Plugin does not use the Widgets API, introduced with WordPress 2.8. Without use of the Widgets API, the Plugin can't take advantage of the multiple widget instantiation that is part of the API.
While this Plugin may technically still function in current versions of WordPress, I think the claim of compatibility with WordPress 3.3.1 is false-to-misleading.
I would recommend finding a more recent Plugin.