This is how they attract investors and they want to establish saying that there's passive income may came to them if they invest on their tokens but they didn't disclose the market activity what it got. Now we see how their tokens struggles to pump and it didn't get decent volume that's why many lose their trust and patience to wait for something great to happen since for longest time this token remains the same and no big movements happen.
If they just release an update and create good utility that can boost their token and its usage maybe there will be a demand also a great price movement will happen to it.
It's always important to have some sort of value to income ratio and as long as that gets better, price will always get better with it as well. Think of it like this, if you were to pay 10 dollars for a token, and get like 1 dollar per month, wouldn't you buy it? Everyone would, hence the price wouldn't stay at 10 dollars for too long since everyone would want it.
If the price is 100 dollars and you make 1 dollar per year, then I am sorry but the price may not go up, even go down. This means that as long as the rewards people could get for having it goes up, then the price of it will go up as well. That's how it has always been like and I am guessing that it is always going to be like that for the longest time as well.