@logfiles - i guess this was more of a paxful question than a bitcoin question. i didn't know if sellers loaded their own or if they purchased it from paxful through their website. the differences there are where my questions about ease of tracing come in. anyway, i'm sure it's fine. the seller was from china, and i'm thinking since mining is cheaper for them, they are incentivized to flip their btc to something easier to sell and profit more.
How did you find the Blender.io?
I don't know how safe blender.io their
announcement thread seems quite their last update is last August.
I suggest you try chipmixer instead it is easy to use, untraceable and fast. As long as your transaction received 1 confirmation you can get your token and you don't need to worry about the fee because you can pay/donate how much you want.
i saw a list of the best mixers, it was from earlier this year. blender had an interesting functionality where it just shifts the orderbook's coins on the blockchain forward by the amount you're mixing. plus it had low fees. though i did view it briefly at work and the firewall threw up a possible phishing warning.. so there's that.
but their last update was August 29, 2019, so they are still active.
here's where i saw the recommendation: cryptalker.com/best-bitcoin-tumbler/