Hi! I have $20k from my Jumpstart account that I intend to transfer out to Dash EasyEarn but I'm confused about it's cap of $20k. Does this mean that I won't earn any interest if I have exactly $20k?

If you have exactly 20k, it will give u 1.8% for the first year. The illustrated returns can be found on their website. Let's say you put 21k, the 1k will not be taken into consideration for the 1.8%. it might be getting a lesser rate or none at all. After the first year, the 1.8% will end and your capital will get whatever rates Dash wants to give.