What sort of effort do you think this takes? I did a quick search for 'buy android reviews' and there are tons of sites that seem perfectly legitimate. The prices are also extremely reasonable, the reviews are guaranteed, and it's not illegal.
The only thing you have to risk is if you somehow get discovered and your reputation takes a dive, but Reddit's already made it extremely clear that they take their current users for granted, so from their perspective there is probably 0 perceived risk and a reasonable potential upside if they believe their review score can help drive more signups tomorrow. So basically you're looking at a low effort, low cost, low risk, mid+ reward type task.
The only thing you have to risk is if you somehow get discovered and your reputation takes a dive, but Reddit's already made it extremely clear that they take their current users for granted, so from their perspective there is probably 0 perceived risk and a reasonable potential upside if they believe their review score can help drive more signups tomorrow. So basically you're looking at a low effort, low cost, low risk, mid+ reward type task.