Sounds like it’s a freemium so increase ads or add an interstitial ad. Perhaps you could force social logins only. Or the Cloudflare wall may help. You haven’t

Sounds like it’s a freemium so increase ads or add an interstitial ad. Perhaps you could force social logins only. Or the Cloudflare wall may help. You haven’t really defined your problem here but I assume you perceive value is being stolen by their methods.