I've thought of using Bitcoin in the past, but I've chosen not to.
As Bitcoin is private, people could use fake but 'real' looking registration details, buy a product, damage the servers (such as overload), or abuse services etc and leave without a trace.
I also don't like that most Bitcoin places have withdrawals set as hundreds of dollars and putting money in is usually at least 50 bucks or so.
For mid-range services I could see benefit, but low range people wouldn't use Bitcoin for the above reasons, and high range opens you up to abuse.
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