In my campaign, only one fatepoint has been burned. When the explorator had an unlucky encounter with a big nasty implement. However, there has been plenty of situations that could have resulted in the loss of FP's. So far they have been lucky and smart. As a matter of fact, I have not yet given them new Fate Points either. Since I firmly believe that FP's are so rare that one has to be really careful about them. Perhaps, I will award them a single FP at the end of the Lure of the Expanse Campaign.

So I wonder how often do you give your players Fate Points and what have they done to earn them plus how fast do they lose them?

I've had one player burn three to survive in my current campaign. The rest of my players are almost eery in their ability to avoid incoming fire, but he always catches the worst of it.

I don't often give out fate points, the last time it did it was one for each of three players who charged a daemonhost at zero wounds.

They go through fate points when they make mistakes. They get new ones when they achieve something spectacular as a group.

They have yet to burn any, but half my players end up using all their fate points end of the game. Most others still have a few left and I would probably attribute it to them being unfamiliar with the different ways fate can be used. They are all familiar with the shadowrun system and edge points, but this is a complete system overhaul for all of them so currently most of them are using them on things they would normally use them for in shadow run like re-rolls.

Every "bossfight" one or more burns a Fatepoint.

In Lure of the Expanse: Every time the melee-based arch militant came in melee with an eldar, he had to burn a fate point. In the end the Farseer splorted him thoroughly + the rogue trader was sniped in the head and had to burn a FP to survive...

I have now ruled that those that make a cool 40k model of their character receive an extra FP (so they don't have to make a new one all the time).