About the business model they don't need to throw tons of free tuff in.
Just some of them or adapt drop method will more than enough.
Or at least look what Kamipro done in this severals months.

Like drake hunt case on Nutaku, I have to run all day to get 3 lv 100 drake.
And with refill, that's too much of effort.
On DMM, if you run drake mission all day with refill, it's mean you get tons of lv 100 drake.
Enough to sell them back to Nazuna.

The problem go back to those staff. They work only in minimum effort to at least let game still online.
They tweak until game spoil and won't fix it. They use entire week to fix bug and still not complete fix it.
And don't forget about they leave for fabulous vacation without any announcement.
On DMM many time bug got fix before you notice there is bug.
There is no excuss for them at all.
I don't know why they still working, they can just resign and go where they please.