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@kaia It's probably not very expensive, if they're all used phones anyway. Meta dumps a lot of money into measurement research and fingerprinting to catch device spoofing & bots, so Selenium might not really cut it. Users of apps like that give away a lot of privacy rights, and Meta uses all of that data to confirm the user agent actually matches the source device. Some sites also blocklist common VPN IP ranges, so using a cheap mobile plan might be better if account longevity is a high priority