I have to use bidbots. I have no choice.

The road to hell is paved with good intentions. I have been here less time than you, and even 1 month ago I was saying the same thing. I had to use them for visibility. But the truth is I don't. There is another path to visibility, which is to connect with others on their posts. Not only can you have a meaningful exchange with the author, but others of like mind who comment on the post.

I think it comes down to expectations. Do we expect instant success, or can it take awhile and grow naturally? To achieve your goals here, perhaps you feel you have no choice, but you do have a choice as all of us do.

How can we get more whales to delegate their votes rather than sell them?

We can't, and it is unrealistic to expect such a thing. Whales have free will as all of us do. So the questions that could be asked is how can I make this grow without ever being noticed by a whale? Is this worth doing if it takes a long time to grow?

I have decided yes, and modified my approach here. Modified it from a month ago when I too insisted I had no choice.