I'm responding to a really old post here, but I think this reasoning deserves some extra attention. Perspective points A, B and C are all about how BTSync is better than anything else. The reasoning is that this justifies everything? They are in a power position, does that give them the right to abuse it? No it doesn't, and even if the 10 folder limit was otherwise a good choice, this would not be a valid argument for it. No one is denying the deceiving, not even the people defending the decision. Have another perspective to this deceit: (to show that we people are not just "throwing dirt"): Upgrading your setup to 2.0 breaks syncing if you upgrade more than 10 folders. Version 1.4 and below can be used exactly as it is supposed to be, and things would still break in the upgrade. That is unheard of. They are forcing people to either stay out of date or pay up. That is much more than just breaking promises. BitTorrent is setting a precedent: They are clearly comfortable with limiting the free version in updates. There is no guarantee, and even an enlarged risk that they will limit the free version even further in future updates. Luckily the 2.0 app on Android supports 1.4 folders. I'm sticking with that for now, I might try Syncthing.