I posted this as a reply, but to a dead comment so it got lost. Telegram also kinda tried something like this with the TON blockchain, and more recently with M

I posted this as a reply, but to a dead comment so it got lost. Telegram also kinda tried something like this with the TON blockchain, and more recently with Mini Apps. It’s even quite easy to make TON payments with their telegram wallet. Buuuut they recently launched Telegram Stars, a more traditional non-blockchain premium currency, and their terms of service are that all payments for digital goods must be through stars (so not cryptocurrencies), because this allows them to give Apple and Google a cut, to not break the App Store/Play Store rules about digital goods/services. So I imagine this messenger would run into similar problems: if you want to be on the apps stores, they probably can’t use cryptocurrencies, because Apple and Google want their 30%