Policy change follows criticism about platform for allowing teenagers to spend relatively large sums of money on virtual gifts.
Gartner for Marketers report predicts 80% will stop investing in personalisation over next five years.
Facebook had breached Apple app rules after collecting data from users about what else they were doing on their phones.
It's not about the money; it never has been. It's about social media companies having clear policies and being able
Most brand research for digital campaigns are being carried out by media owners to justify spend, report warns.
Similar tools were previously only available for mobile apps.
Moves to fix improper data-sharing with advertisers have cost platforms millions in ad dollars.
User growth was particularly strong from outside North America and Europe last quarter.
Snapchat expects they will initially appeal most to retail, ecommerce and direct-to-consumer advertisers.
Blanket ban comes at time when China's influence over social app is coming to light.