Hi,
Spark is my first drone and I love it from day one! I got the Mavic Mini, but personally I am more a fan of Spark design! It feels robust and quality made, I like its lights unlike on a single one on the Mavic Mini! Which looks like actual aircraft with tow one and two flashings.

I was honestly hoping DJI would upgrade Spark with 4K 60p camera, longer battery, lighter and more durable materials, and make it quieter a bit. But then to my surprise nothing.

Do you think DJI gave up on it, since the release of Mavic Mini?

I do think so! Unfortunately most likely NO Spark 2/pro

Hello and good day Josip. Thank you for reaching out and for this inquiry. As of the moment we do not have any information with DJI's Future products and updates. Kindly please stay tuned to the latest updates by subscribing to DJI official website at www.dji.com or following us on social media ( Facebook: https://www.facebook.com/DJI , Twitter: https://twitter.com/djiglobal , YouTube: https://www.youtube.com/user/djiinnovations ). In addition you may try to check the DJI Osmo Action. I will post a link where in you can see the overview, specifications and frequently asked questions for the said camera ( https://www.dji.com/osmo-action?site=brandsite&from=nav ). Thank you for your support.

Seems like the Mini is the replacement for the spark,  before the Mini came out there were a lot of sales on the spark.