So far I only received that one message and I hope it stays like that, and like you I also wonder from where they got my number but since binance is the only crypto related platform wjhere I shared my number, chances are its from their data breach. And nowadays its not so easy to change number as bunch of stuff are connected to it.
Nope, I also received a phone call from a Greek mobile number with an automated message supposedly from PayPal. I'm not sure if they're related in any way, but it's getting annoying. I also have a PayPal account, but the call could have been a random scam attempt, a product of mass calls, similar to SMS ones another user previously mentioned.
You can actually buy these services online. In my country, I can buy around 300 Bulk SMS just by spending $5, and I can use whatever name or number I want as a sender. The service was too cheap. I did not check the current rate. Hosting providers and other businesses usually use these services to send SMS to their clients. But showed an example of a scam attempt. I guess these things happen in my country as well. There was a website named afreesms.com and I used to use it back in 2015 to troll my friends. I could use any number as a sender but they changed it a year later. Their service was totally free, and I used them.
Unfortunately, it's that easy. However, up until now, I hadn't received an SMS message that appeared to actually be sent from the platform itself, so it's quite new to me, even though it screams scam from miles away.