In general, in the tokenomics of tokens such as BFG, there is no such sharp decline in staking revenues.
The decrease in staking income for any token is usually quite smooth and there are no such sudden changes. Of course, if we talk about the tokens themselves, without taking into account changes in its exchange rate against the dollar. Of course, such a picture is possible when the price of the token itself falls sharply. But such a sharp drop in the price of BFG in recent years, it seems, has not been. The exchange rate fluctuations were quite within acceptable limits. And now the token is recovering a bit in price.
So its not entirely clear why you write and reduce the income from staking by 6-7 times at once.
You can't compare staking system with other tokens or coins either. BFG staking isn't about securing the chain or anything like that, and dividends aren't paid in BFG but other various altcoins.
It's quite unique model. I personally don't understand why people are buyng it now, you can't calculate how much you are making even month from now even though there's a calculator for that. But one thing is sure. At this rate you are not going to make back your investment like ever. Only way to do that is by selling your tokens if token price suddenly rises, not dividends.