Very often fake accounts are simply to have a profile that has spam content in description. Actual content publishing is more complex to orchestrate programmatically and gives away more red flag for the spam control tools to spot. The incentive usually is that spammers get paid for amount of mentions or backlinks they can create for a business, and so they try to post anywhere they can.

Standard workaround (besides captchas and paywalls) is to limit display of new and inactive profiles. You can for example limit visibility of profiles to authenticated only, or similar to how facebook does it - only show minimal Cover content publicly.

There is another angle where they create profiles that show business name + url/phone in the Name, which of course doesn't convert a link, but it is still an attack vector. You can limit max character for profile name to reduce the problem, and we're now working on an Agent which will use AI to assess profile names to auto-suspend spammy ones or enforce your community guidelines (i.e. real names only, no swear words, etc).