That's a real sticky wicket. It is all based on intent, not monetary compensation. The person in the FAA handling your case is the judge and jury. Say you and a friend are flying around his house having fun. You did this together so you give him a copy of the video. Some time down the road your friend decides to sell his home and gives the video to a real estate agent. The agent then sends you a gift card as a means of thanks. Most likely there is no infraction here but if the FAA agent decides there is, well, then there is. In one article I read a couple had a youtube channel that was monetized and they were posting a lot of travel videos including drone footage. The FAA got complaints about the drone footage. In that case the FAA contacted the pilots and told them stop that now until you get your 107. They got their 107 prior to posting again and no fine was assessed. In the case of selling a home, if you did a video for a friend and gave him the video with no compensation full knowing it was going to be used to sell the home you could well get fined. In most law it is difficult to prove intent but with the FAA there is no one that the FAA needs to prove it to. If they are convinced that's it, done deal. In the case of a monetized channel, it would probably be rough to convince an FAA agent that it was for fun and you did not intend to use the footage to build or boost the channel. Even if the channel was not monetized a case could be made that your intent was to build the channel. From what I have seen to date, this would most likely have to be predicated by complaints from viewers. I've not seen an example to date where the FAA has went channel surfing to catch rec pilots with other that rec intent.