Flying above 120m requires you to request autorization to do so in any case. You can't apply for that without a license so the limit for unlicensed C0 aircraft is 120m.
You can switch it to C1 to remove that, but then legally need to be licensed...
No.
Unfortunately there are a lot of paranoid people out there who will try to get others paranoid as well. It's kind of like how a lot of religious people try to force their beliefs on you to validate their beliefs. So are the paranoid. They...
If you want free apps that will stay free, don't discount FOSS. Gimp is a pretty good image editor, but with a learning curve.
For video editing, there is Kdenlive, I've never used it, but it has been getting good reviews
Which part was not true? That the RID phone apps provide a less than optimal experience for the end users, or that Dronetag RIDER is priced outside the reach or desire of most consumers?
Next time you see a drone in the wild, go for it and see how easy it is to track it down and the owner. I bet you stand less than a 50/50 chance of getting the details. An IOS or Android app with that kind of record is deleted and never used...