I am getting an interest boost of 2.5% and on the website it is displayed as 4.18% yearly interest and not 6.58%. As a percentage of my total balance it is only a 0.10% increase but as a percentage of the previous rate it is 2.5% higher.
For me the extra interest is not an important factor to consider when investing in FUN because unless you're a big whale who can deposit several BTC it will take more than a lifetime to earn back what you paid for these tokens from just the additional interest alone.
I believe that's not really that impossible but you are forgetting the fact that you also have fun token, which could be more valuable or not as well. So we are talking about something like buying a house, sure most of the time it would take maybe a decade for you to get back the house value from the rent profit you make each month, as a landlord you buy a house for 200k and rent it for 1000 and then you get it back after only 200 months. However the house is also now 500k after 200 months, you are forgetting that profit.
Same here, I want to have as much fun token as possible, will stop when I have the max interest available, put all my money into my account so that I gain as much from interest as possible and even with that it would take a good amount of time to recoup that BUT that doesn't mean that I can't profit quicker, fun token could go up a lot as well during that same period.