We continuously under attack by "link farmers" and spammers. We have tried every measure to combat it. It's mostly coming from Russian IP addresses and we have blocked a wide range of them.
Here's the deal: Our content is valuable. Our audience is even more valuable, as they are highly educated and purchase influencers. As a consequence, there are real people being paid to create accounts and post various things, some spammy, some that are just link farms. It's impossible to stop real people. We've tried moderating, but it's often 30 people working on the link farm!
What's worse is that when they get in, they can connect the account to a bot to place links in various threads.
As it is, the only CAPTCHA that stops such things is a paywall.
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