Thank you for doing the math.

Bidding bots do pump liquid Steem around. Usage gives value to a token. It is a part of Steem where 'advertising' benefits every Steemian. Whether I like this or not personally is unimportant. But I can publish about it.

Bidding bots will be around also when payout division goes from 75-25 to 50-50. Their post payout share will go up a 100%. Meaning they can, at least, half their asking price.

In the worst case scenario, from their point of view, their SP growth rate will stay the same. But, being cheaper, at least half the price, will make it easier for publishers to use these services. As their direct rewards have been lowered from 75 to 50, their incentive might be to use bidding bots even more often.

Your idea for a slider where you can choose yourself is a better idea. Then I would also add one for the actual payout too. A choice how your payout will be done: from full liquid Steem to full SP, or Zero.

Now the point where the individual has a free choice, using sliders for instance for division and payout, that would be interesting to watch evolve.

Yet, locking 50-50 in, would just mainly be an extra, 100% growth, reward for large SP holders. Self enriching for them is okay, when publishers selfupvote it is wrong.

And I simply do not buy it. Steem is about competition, more members means tougher competition. Less payout for publishers, on average. This measurement, if enforced, will just make the huge SP holders richer, faster.

While less rewards are being shared with more publishers. And that is where things will start to proof that investments do nothing by themselves. Meaning Steem will drop in price in the market, as publishers move their SP out and sell.

Then the overall publishing quality drops. Yeah, those greedy needy publishers who needs them.

Then there will be posts about how publishers are egotistic bastards and how Steem needs to go back up. Because not even half a cent per Steem is just crazy. It will be stakeholders posting about Steem. Hoping more will come to look at posts about investing in Steem.

In the meanwhile others will have found rewarding new places for their publications.

Just to balance things out a bit.