What is your native language? I don't get people saying "this sounds dubious", without any explanation. If "nazi" is what came to your mind, don't worry, "na zdravi" means "to [your] health".... And if something sounds weird to you doesn't mean it sounds weird to everyone.
Learn to use razor blades. They're better that you think and are good economically. Also, they're much more ecological. On the other hand Phillips is the opposite. I just had to throw away a oneblsde shaver because its battery died and they make them very hard to replace.
That's exactly what Amazon is doing and did for a long time: sell stuff at a very very low profit (or none at all) and make the competition go bust. If we would all buy it from the competitors, little by little in time the price will level - theoretically speaking.
I can tell you something: I'm using some free apps on my Android phone and never notice ads at home, but when I'm on the mobile network or on a different wifi (at work or some public place) I start seeing them.
Sync was almost always like this - the Dev takes long breaks and then updates the app with lots of good stuff. He did this since reddit days, so I'm really not concerned
Are the windows PC local to your network? If not, are you forced to use Ninja Remote? There are other applications that have Linux clients for remote access.
Very nice!