If any of you use temp-number.org, a fair warning: either don’t pay it with crypto or just don’t use it at all.
Last year, I deposited $5 into my account balance for that service. I used Monero, because their old payment processor accepted that. I think it was Coinbase? But don’t take my word for it because I do not remember. Just know that their crypto payments used to work, and rather painlessly too.
But one year later, they’ve changed their crypto payment processor to 0xprocessing… I have never heard of this but upon first experience they seem sus and scammy. First of all they do not accept XMR.
So I was trying to reload my funds again with crypto on Temp Number, and the minimum funds deposit was now $25 for the new service. I went to exchange some XMR –> BTC, around $30 to fight the extra fees just in case. Well, not only was that not enough for them, I ended up not using their service anyway at the end, so the trading ended up being pointless. 😂 Why?
Upon selecting the minimum amount ($25), 0xprocessing will actually bring you to an error page saying that the minimum amount is actually 0.00082000 BTC, or, around $35. False advertising kinda but I just assumed that this was an innocent mistake on the merchant’s end, so I kindly told Temp Number that they should re-adjust their set minimum. Their reply is “Sorry, we use 3rd party crypto billing and we unable to change the price or minimal amount”. Okay, well, whatever. $35 minimum is fine too. But this time I actually got curious - I figured that I shouldn’t trade for more BTC just yet.
I input the minimum of $35, or 0.00082000 BTC to the service, juuuust to see if it would work. 0xprocessing now charges me for a whopping $59 as my final price. What. Da. Fuck. It went from $25 (false advertising), to $35 as the real minimum input, to $59 as the final checkout price. This is literally a scam.
I messaged the support desk again about their crypto processor demanding absurd prices than what they are actually shown. The agent replied “Please select $40” which doesn’t mean anything because no one’s gonna pay $63 to deposit $40 of tangible funds. 
He also said to use another crypto, like USDT. Uhh, no, I think I’m just done here lol. 😂