If you do not guess the additional number correctly but get the 6 lotto balls right on target then you still win the second prize of 2 million Euros, which itself is a huge amount. You could become financially set for the rest of your life while leading a luxurious life.
Sweden and many other countries only have a guaranteed first prize of 200000 Euros by comparison and that too, if you are the only winner. If you are a regular player then you might simply end up winning and sharing the prize with many others. But in Liechtenstein lotto, even second prize can shower you with real wealth and financial security for life.