Hi @Simonjanzon,
To answer your first question:
First of all, why is it logged? What does it mean?
This message is an indication that you have a TransactionSampleRate configured for your monitored service.
In case a transaction is not sampled (i.e. it is not reported to APM server), a log message with severity Info is reported. That's what you are encountering.
Can you please check which LogLevel you are using in your service?
Also, which way of configuration are you using (environment variables, config file, ...)?
Thanks,
Wolgang