"Nothing has changed about the control you have over who can see your photos," according to Instagram co-founder Kevin Systrom.
"To help us deliver interesting paid or sponsored content or promotions, you agree that a business or other entity may pay us to display your username, likeness, photos (along with any associated metadata), and/or actions you take, in connection with paid or sponsored content or promotions, without any compensation to you."
Markey pledged to "closely monitor" whether Instagram ensures that "personal information is protected and not sold without permission.”
Instagram has recently become quite popular among politicians. Although many celebrities and regular users were deleting their accounts on Tuesday in reaction to reports on the new rules, users such as House Republican Whip Rep. Kevin McCarthy (R-Calif.) were still using the photo sharing service as of Tuesday.