I'm sorry but I have some doubts about the sustainability of this interest rate over time. Let's do some mathematical calculation.
Investing today $100 and earning 2% per day with compound interest would be having:
10 days after $121.9 with total interest rate 21,90%
30 days after $181.1 with total interest rate 81,14%
60 days after $328.1 with total interest rate 328,10%
100 days after $724.5 with total interest rate 724,46%
200 days after $5,248.5 with total interest rate 5248,49%
365 days after $137,740.8 with total interest rate 137740,83%
I feel it is quite difficult to have these gains, even in crypto magic world....
But you are making one wrong assumption in here, which is key. It's not an interest rate. You invest in campaigns which make MNZ money, and they share 80%+ with you, obviously because it's your investment.
If they don't make money, you don't make money. Which is a key difference between lending schemes with guaranteed interest rates.