Interesting calculations:
- VNL superpeer: roughly 300 VNL/month = 0.037 BTC = 15 USD. ROI: 36%
- DASH masternode: 10 DASH/month = 0.06 BTC = 25 USD. ROI: 12%
Seems like VNL superpeers are 3 times more profitable than masternodes for now. DASH ROI will only decrease over time because it depends on block reward and number of masternodes. For VNL it's not clear because the amount of PoW given to superpeers is constantly increasing.
It's always good to know more and try to calculate ROI, but this what you have done here for VNL is not acurate in so many ways.
You introduced to many parameters which can influance on final result but on the end you are comparing USD value and percentage is given for a year.
Investment
You must decide if you will calculate in USD or BTC or VNL cause all that influance on ROI and only calculation in VNL could give more or less acurrate number because...
it's not the same if someone bought BTC @250$ or 350$ and then bought VNL for ~9k or ~12k or ~25k
So based on timing and USD/BTC/VNL coresponding prices this can change every calculation.
All mentioned should apply to DASH as well.
Rewards per day / per month
... in average that should be blocks generated per day / nuber of super peers - currently ~1,6
So currently 1.6 x 8.74 x 30 that should give ~400VNL per super peer per month with notice that
- in last month nuber of superpeers increased from ~130 to ~240 and
- fact that rewarding system is based on luck
... so it can happen that some super peer gets 2-3-4 rewards one day and next day gets none
So if we would look at current numbers and we look only VNL than ROI on yearly base would be ~ 48% or 2,08 yeras to ROI initiall investment but...
... what is hard to predict is what will happen with number of super peers in future and specially in time when price of VNL will go up.
What is known is that every 50k blocks PoW reward is reducing by 1/6 and progression of super peer percentage rewards can be found here:
https://gist.github.com/john-connor/967ba7f7e9dd0ec1f7a9So, calculating/predicting ROI for super peers is as hard as for mining except here you always have your initial investement in VNL while in mining you have pile of old hardware.
You're right, that's why I added the "for now" part. So it's accurate for the time being only and the ROI is just an extrapolated value which will most likely decrease as/if the coin gains popularity.