Facebook users were also experiencing intermittent problems accessing the site on Wednesday, but spokeswoman Meredith Chin said the problems on Thursday were unrelated.
News feed: Facebook site down, slow for many users →
"As we have said in the past, we are continuing to evaluate when, how, and in what form advertising inside Instagram plays a role in creating value for users and brands alike," Facebook spokeswoman Meredith Chin said in an email.
Instagram users fear photos could turn into ads →
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