All this talk about The Business God gives certain insights about your whole world. (Good gives peace, Evil offers control, remember?)
If you behaved nicely, you get a nice afterlife.
If you have done everything to get power AND the Evil god liked you, he may allow you to become after death his servant and continue your efforts, for his and yours Power.
The others probably get what they deserve...
What about the others?
If you couldn't be the angel your mamma wanted you to be, or just don't have the talent for an Evil overlord, you can get an
acceptable afterlife. It won't be for free, but its a fair trade.
To confuse the thing, trade is partly advertising, so
The brightly lit hall ... the delightful companion(s) ... the pearly gates
are not the truth. People that have such afterlife, would not wish to trade it, except
for great need for the powers. The afterlife you will get will be somewhat duller. Alternatively, it is the afterlife you
may get, if you work very hard. But if it looks bad, it surely is worse...
Various thoughts around the theme:There is some hope within this world, for even if you screw up badly, there is still a chance you can improve it somewhat.
...to learn great skills, so as to not have to use a power unless absolutely neccesary.
-you may need the great skills to be able to use the powers. Being infused with Holy Power can hurt badly, or outright kill you. Another reason for the older priests to very carefully consider such use. May be a deterrent for those frail of body or mind, or a plot hook, what happens IF.
Another way to appease the god of trade may be to trade yourself! At least this god is not against his followers hoarding money. But its not the money, its the trade. So, opening new trade routes and finding new contacts is
the mission. Before you start singing happily that peace==better trade, there are always the weapon-dealers you should not forget.

One more option for the old ones, who have surely many good business-friends.
When you die, that's it, you just end, no more existance, not even sitting on your butt in stark nothingness, you just stop being.
This is individual, and may be actually a welcomed form of afterlife. Or a horror to wait for. Or the
sitting in the void forever may be THE punishment. Or never-ending torments. Or trying to reinstall Win.. forever. Or get a 1 Byte connection to Internet. Or...
One man's heaven, another man's hell.