Hi there, @Petar_Dietrich 
I completely understand your concern about the lack of a spam protection mechanism, and I’m really sorry it’s not supported yet.
At the moment, this feature isn’t on our roadmap, but we have received a request for a CAPTCHA option. Hopefully, our developers will be able to consider this improvement soon. We’ll keep you updated in the Wishlist thread if there are any changes 
Regarding the messages used, our devs and the Support Team don’t test new features on customers’ widgets since they use their own widgets for testing.
We can use some of the messages from your limit, but only when a user reports an issue with the chatbot’s response or needs a custom behavior setup and the number of messages we can use isn’t high (usually, just a few messages).
Additionally, I’d like to note that such tests or setups are performed through the configurator (except for the script testing, which should be live), so the messages used will be deducted from the test message limit, not from the overall message limit given on your plan.
Looking into your case, I don’t see any recent requests from you on the forum or in our support folder that would require the dev team to use your messages.
To confirm this, here’s a quick breakdown of messages used for the last 2 weeks:
May 5-6
Only 15 messages were used, all coming from your website, meaning they were sent by you, your team, or your clients:
April 28 - May 4
No conversations during this period.
April 24-27
12 messages were used. Most conversations came from your website, with the exception of one message sent by us to test the script for opening the email service in a new tab:
In total, 27 messages were used over the last two weeks, with 26 sent from your website. The messages appear to be live and not generated by bots.
I hope this clears things up.
If you’ve noticed a spike in message usage during a different period, please let me know, and I’ll be happy to check things.