That passage relates to us reaching out to you as a developer. (Your players and their data is covered in the separate player privacy policy.) If you don't want mails about updates etc just tell us and we'll stop sending them.
You are right, I did not read it carefully. Looking through the player privacy policy is still concerning though. The weasel word reasonably comes up 4 times, including:
3rd party sharing:
"We will only share your data with third parties:
with your consent (including as set out in this Player Privacy Policy);
as reasonably necessary in order to provide the Services to you;"
"as we reasonably believe is permitted by law or regulation; "
Information retaining:
"We may retain information about you after you have deleted a Game or after we have ceased providing services if retention of your information is reasonably necessary to comply with our legal obligations, meet regulatory requirements, resolve disputes between members, prevent fraud, cheating or abuse, or enforce this Player Privacy Policy or any other agreement we may have with a user. "
Point 5. looks especially bad to me:
"5. Other Information
.. We may combine information that we collect from you with information about you that we obtain from such third parties and information derived from any other subscription, product, or service we provide. "
I understand it is not very different from currently accepted practices in privacy policies, and one could say it is unfair to point out just in this case, but it does not make it any better.
Disclaimer: I don't think Defold is a bad actor, just my 2 cents when somebody wants to do the right thing