What's the difference between 'Join' and 'Commit to Join'?

Selecting the "Join" option means that you’ll purchase the item regardless of the price point that’s reached.

 

The "Commit to Join" option is only available on drops where the lowest price point hasn’t yet been reached. When you select this option, your order will only be placed if enough people join for the drop to reach its lowest price point.

 

You can change your joining option at any time while the drop is still active.