What @laonie accomplishes is not typical. He has the advantage of using a lot of his own accounts in his trails and has been building up SP for months by automated vote. What he earns now is a result of all of that work. I don't think the average user would want to do that just to earn SP.

Rather than finding a new gimmick for SP accumulation, why not find more/better ways to incentivize powering up? We want more people to hold SP, not more ways for it to be exclusionary. Let's think of some new ideas for how SP can be used to the advantage of users and investors alike.