Spam factory accounts Member in a very popular topic

In the last few days there is some invasion of bots in a very popular topic in the Russian section: Analytics, analysis, forecasts, news
The rules of the forum Postings do not violate, as they have a link to the source, but distinctive features of accounts:

1. All accounts have a signature

2. All accounts are very old and probably hacked

3. All messages on one pattern (only the headlines of articles from popular resources about cryptocurrencies and a link to the source)

4. All messages are sent every few minutes

Someone clearly decided to automate the process of posting messages for signature companies on the forum?


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UPD:

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