That is a good question and I think everyone has a different answer. For me, I don't think there would be an amount where I stop upvoting. My outlook is that the more SP and value my account has, the more I am able to help others.
If I was just self voting my content daily and then logging out it would be a lot different, but as long as you are making an effort to help other steemians, I don't see the problem in only helping yourself. No point in giving all your food away if it means you will starve to death
So should all steemians at all levels self upvote - even right at the top?
That would drain the finite reward pool even faster - and those at the lower end would get even smaller crumbs to feed on 😊
I don’t think there is a definitive answer for this. I think as long as you are giving more to others than you are taking for yourself, you are not doing anything wrong. For example, say my upvote is worth $10. If I upvote 9 other posts a day while giving myself one upvote, I’m doing a 9:1 ratio. I see no problem with this
I completely agree with you. If you spend the time to put together a good quality post, by all means give yourself an upvote and well done. You just took the time to add value to the community.