No more than any other full floater.
- The bearings are sealed so they should only need replacing every few years or so.
- The bushes usually last a year, but you can feel their state by any 'knocking' when you take pressure off the wheels, or by trying to bend the swingarm laterally.
Stripping down the frame and regreasing the pivots won't do any harm, but certainly isn't necessary - I find it just makes getting the bearings out easier when they need replacing. Admittedly, after a wash I put a few drips of thick 3-in-1 oil inbetween each pivot - truthfully I have no idea if this does anything, but it probably stops water sitting in the bearing cavities for long periods.
As for any other sealed bearing do not spray GT85, WD40, or any other water displacing fluid into them. They come pre-greased, and if the seal fails, it needs replacing.