Likely means the app doesn't work because Telegram is being blocked at the network level. Similar to how many telcos offer "free" Whatsapp on their plans, they can filter the traffic.
That's different though: Presumably WhatsApp is participating in these deals and is making their traffic explicitly identifiable (i.e. I'd expect them to provide a list of all IP addresses and hostnames their app connects to as part of setting up whatever cost sharing agreement they presumably have in the background).
Telegram will probably be optimizing for the opposite.
Telegram will probably be optimizing for the opposite.