Evan!

There are more scales than just two. Also CRC passes!

• 60 pts = 500 SkyMiles (reward id 2180 )
• 170 pts = 1,500 SkyMiles (reward id 2181 )
• 570 pts = 5,000 SkyMiles (reward id 2182 )
• 2850 pts = 25,000 SkyMiles (reward id 2183 )
  
• 5,700 pts = 50,000 SkyMiles (reward id 2184 )
• 400 pts = 15% Delta Ticket Purchase (reward id 2185 )
• 145 pts = 1-day CRC pass (reward id 2186 )

When browsing through the rewards the items appear to be displayed randomly. I am sure this is to make all the partners happy. If you don't see a scale to your liking keep browsing through the pages over and over again. Your level might magically appear. These are all the DL rewards I could find.