That's the worst chatup line anyone gets with online dating.
Also right up there with "hi there," and, "hey there," and, "how are you," and, "got pic?"

You say "hi" to get a response from a person in public because they come back with ten thousand emails worth of body language and indirect communication along with the replied "hello."

You say "hi" online for just a "hello" in response you simply waste everyone's time.

Online, a conversation has already started with the profile and picture.

You continue the conversation, not look to start one or passive aggressively try to manipulate them to drag one out of you with "hi."

Online, anything is better than "hi."

Any chat up line, no matter how bad, is better than "hi."
Even if it leads to you being disgusted and blocking the person, at least that's a definite decision, the line led to useful information.

Hey babe you want go out with me? In a smooth moncho voice, raising his eye brows up and down.
All I did in response was laugh at him. (A big hearty laugh).
Then he said is that a yes?
I said still laughing sorry no.