they stated listings were pulled as selling of digitally delivered goods are against policy. i see alot of other listings have disappeared also so maybe an ebay wide thing going on..
They pulled them because the scammers are going crazy on anything bitcoin related, including mining contracts. I lost over $1k and are still getting Paypal reversals. Each morning I check my inbox and am prepared to groan at the next 'unauthorized' dispute.
I reported every scammer and also contacted as many sellers as I could (daily limit on contacting sellers sucks, but used multiple accounts). Got many of them to report other fraudulent ebay buyers and maybe between that and all of the Paypal disputes it got their attention.
Or maybe ebay read some of the ebay/paypal community forums because I haven't been quiet about how Paypal screws sellers. Even with 10 lines of evidence Paypal would rule in buyer's favor. Seller takes all the risk. This has killed the secondary in-game currency / virtual goods market too.