No one. Don’t delegate anything to anyone.
50 SP is a tiny amount of Steem. But more importantly, you should keep your voting power to use for your own personal gain.
It’s sad that people think that delegating is going to get them a better return instead of the return a person can receive through using their SP on themselves or via voting on posts that they believe will earn a great number of votes.
Even self voting will give you a better return than delegating to some shit bot or crappy service.
So don’t delegate to a bot or some random Steemit service. Keep your SP working in your account and for you via self votes.
If all you have is 50 SP then you need that SP for resource credits and so that you can self vote as much as possible.
First of all, 50 sp is not a big amount to aspect bigger reward, But you can delegate your sp to @steem-ua,
What is @steem-ua?
Well it is minnow support program that upvotes you once in a week according to the sp delegated to it,
if you delegate 50 sp to @steem-ua you will get 1 vote in a week according to your score.
You can delegate it to @tipu and can get maximum percentage of return out of the so many available options of bot in steem platform.
The key is the more you delegate, the more you will get.
50 SPs are classified as small numbers, if you have a large number of SPs, you can delegate them to services like Minnowbooster or SmartSteem, but I would suggest selling votes.
But, remember the keywords, the more you delegate, the more you get as a reward.
I would suggest delegating 50SP to @team-cn if you're a Chinese writer. The ROI is the highest by far to the best of my knowledge