Hey there. Today I found a profitability calculator for delegated Proof of Stake (PoS) for ARK. It's pretty awesome. Here's a screenshot:
If you were to invest 10K Ark (~11,000USD) you would earn an average of 2.6 ARK (~2.86USD daily).
Here is the source file:
https://docs.google.com/spreadsheets/d/1FGo3FkC3uSWXGHatPQyny2brMWjAIJsHFCR-Lhkl_m0/edit#gid=0
Enjoy.