Congratulations Mortand! Great picks in this Vuelta, nicely done! Also congratulations to other podium finishers Hartog and Lancaster, and a big thank you for organising this to Foxy
That 0,5 rule sounds pretty good, but I'd change it to 0,25 point if the predicted riders gets third and 0,5 if he gets second. Some distinction between second and third seems logical to me.
On a similar note, perhaps a rule like that in the final GC as well? For a rider predicted on the exact right spot 2 points, when one spot off 1,8 points, two spots off 1,6 points, ... and five or more spots off just 1 point.
Also, perhaps double points for the podium spots in GC? Those are the placings that matter most of course.
All these things would make the game a bit more complicated, and especially a lot more work to calculate the standings, but would make it more fair I think, since wether you picked the correct rider on 16th and 17th spots is pretty much down to sheer luck. Although perhaps the charm of the game is that it's so simple, I don't know if these changes will improve the points.