Why does Gatsby stop throwing parties in Fitzgerald's The Great Gatsby?

Gatsby stops his extravagant parties because he has finally captured Daisy, and because he now desires privacy.

Interestingly, Gatsby has dismissed every one of his servants. He explains to Nick that Wolfsheim has urged him to use people he knows for servants because they will be discreet about Daisy's visitations. At these words, Nick reflects,

So the whole caravansary of servants had fallen like a house of cards at the disapproval in her [Daisy's] eyes.

The new servants never go into West Egg; instead, the food and other items are delivered. "I wanted somebody who wouldn't gossip." Gatsby tells Nick. It is also apparent to Nick that Gatsby only held such lavish parties in the hope that Daisy would attend them; however, the parties did not draw Daisy to him, and Gatsby himself derived little pleasure from them.

After having finally resumed his affair with Daisy, Gatsby feels that he has recaptured the past, but now he has the one thing that he lacked before: wealth and possessions, those things that are so meaningful to her.