Questions about example sentences with, and the definition and usage of "Retweet"

A:
The meaning can be somewhere along the lines of the following.
Thank you for the reply of the tweet.”
“Thank you for your response to my tweet”

A: In Twitter, you can press a button and ‘retweet’ someone’s original tweet. This will put their tweet onto your account.

A: This button on Twitter

A: Like on twitter when you retweet someone it's similar to reblogging if that makes sense

A: "Why doesn't he retweet anything?"

Or, if you're talking about the opposite:

"Why does he retweet everything?"

Hope I helped! :)

(Why do you have crying emojis: 😭😭)

A: Natural, however I would personally make a few changes:

with my account → on my account
in a short time. → in a short amount of time.
"me" can also be removed, since you already said "my" account

"The retweet feature on my account has been restricted due to retweeting too often in a short amount of time."

A: From now on, I’m going to take it upon myself to retweet all of the fan art on see on here

OR

Going forward, I’ll be retweeting all of the fan art here