extra money for PUSH !!!

to ask for extra money for PUSH notification makes no-sense. we already pay to download this app and PRO version could be for unlimited push version agains double in price. but to ask continuous payments for push messages makes this app only 2 stars. the aim of this app is not service but money.
the other competitors are free for push notifications. i made a mistake by buying this app.

fuhayerN about Flight Status - Live Flight Tracker, v8.1