The consequence for not obliging with the online safety bill is pulling out from the UK market. The consequence for ignoring legally sound US court orders is Meta executives going to jail.
FTX was making a killing, so its token that paid out trading fees was worth a lot. To bail out trading losses in Alameda, FTX sent it cash in exchange for a bunch of its own token. This might have worked out fine, except now the moment everyone expects FTX to go bankrupt, it's bankrupt.
In terms of CO2 per unit energy burning plastic is much worse than burning natural gas (and much much worse than any zero carbon source). Energy is fungible, there's no reason to encourage producing CO2 when it's possible not to.
Telegram implements video calling using bunch of sketchy C code same as WhatsApp and Signal. There's no reason to think it's less vulnerable these sort of bugs.
Notably on iOS there's no good way to isolate unsafe native libraries from the rest of your app without violating app store policies, because Apple enforces apps to be single process and doesn't allow use of its own sandboxing apis.