Why do I need additional countdown timers?

You actually don't! We only recommend the PRO level account to users looking for additional flexibility. 

With a basic account you can create 1 live countdown for your website (the same countdown can be placed on multiple pages) and you can edit/delete and create a new countdowns at any time. (But only 1 can be "active" at a time) 

PRO level accounts can create unlimited countdowns that can be used in multiple campaigns.

For instance you could add a countdown to a sales page, use a different countdown on your landing/launch pages and then another on your blog etc (all with different times/dates & styles).