Sort:  

If users were doing that, then there would be more money "at risk" if they got downvoted.

Users are at a very low risk of being flagged for vote buying now. If the practice was practically a must for every newbie, then a flagging campaign against vote buyers would kill platform growth. As the valuation of STEEM is entirely based on expectation of future growth and advertising and promotion income in the distant future, the cessation of growth would kill the platform.

It is a bit of a speculation to go that far, but I see your point.