Do social media (twitter, etc) posts count when contributing quotes?

Personal quotes on bio pages, you mean?

I'd imagine so.

Hi Teejee56, 

As long as the content of the quote fits within our guidelines below, these will be considered acceptable forms of biographical quotes.

https://help.imdb.com/article/contribution/names-biographical-data/biographical-data-guidelines/GMT9T242VQADZUQM?ref_=helpsrall#realquotes

Thanks
Meredith