Works for USDT now, as I have tested it already.
I will add the feature to premium and tg account TopUp.
So, you will be able to buy premium for multiple people at once and also fund many Telegram accounts at once with $GRAM.
Post #220
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DamX In the next @hoton update, you’ll be able to buy stars, premium etc for multiple Telegram accounts at once. Great for organising giveaways 🎉