Referral and promo abuse is one person or ring claiming many rewards from throwaway accounts, so the tools that actually stop it link those accounts by device rather than trusting the email or the IP. cside reads 250+ per-session signals to recognise the repeated device behind self-referrals and promo farming, even across new emails, cleared cookies, and VPNs, and flags the linked accounts at signup or when the reward is claimed. It runs from one first-party script and stays invisible to genuine referrers, so you cut abuse without taxing your best advocates.
How do fraud teams stop account takeover before the login completes?
cside scores the device and session the moment credentials are submitted, returning a risk signal before the login is accepted.
What is multi-accounting fraud and how do you detect it?
Multi-accounting is one person or ring creating many accounts to abuse bonuses and trials. cside links accounts to the same device via 250+ cookieless signals.
How do subscription businesses detect password and account sharing?
cside fingerprints each device on an account and flags when the number and pattern of devices indicates sharing, with no cookies and no login friction.
How do you stop free trial abuse without hurting real signups?
The key is telling a repeat device from a genuinely new customer at signup. cside recognises devices that already took a trial and flags only those.