Most people would find being fined a week's wages significant. It's not what they'd expect to get for, say, murder, but worse than any parking fine and enough that they'd give serious consideration to not doing whatever they did again.

Depends how much you made doing the activity you got fined for. Temu says the fine is disproportionate (of course) but I'd be surprised if they made actually less than 200M selling such goods over the years. Ideally it should be several multiples of what was truly made, otherwise it's just a bet you might not get caught or, in the worst case, a loan until you are fined.