While some of the supposedly "Low Cost" revenue fares are a bit of a con really (like LCA for example) the redemption rates are pretty good value (albeit not all of them make sense...)

LCA,PRG, and BUD will be 240 points return (150 for the initial 3 months) compared to today's rates of 500 for LCA and PRG and 700 for BUD (reason for PRG currently being cheaper than BUD must have something to do with it being operated by Sundor).
Again, LCA being relatively expensive compared to PRG and BUD bearing in mind the length of flight.

KBP will be 400 points return (200 during the initial period) compared to 700 today (yes, not sure why it's going to be more expensive than BUD or PRG but there you go...)

And finally TXL which will be 500 points return (300 during the promotion) compared to the standard LY western europe 900 points return.

The cash part of these tickets is also lower than the current redemption rates.