The suggestion is that people accept for a 2% yearly return (upvoting) instead of a ~20% yearly return (renting out their votes). The platform obviously values one more than the other. You're suggesting that people make a sacrifice for the "greater good."
Why give such terrible advice?
But, if you build a community of mutual support, the return on that voting power is limitless. But, you go ahead and accept that 20%, while the guys that are renting it from you multiply it, just like the fortune 500 companies do with 401ks. We use them because they are presented to us as the safe option, not because they produce the best results.