This besides the fact that Bitcoin on GPUs is fairly dead, it's almost entirely done on ASICs now.
If you read the license agreement it states that the term applies to 'blockchain processing', not to bitcoin specifically.
There are a number of "alt-coins" (blockchain-based cryptocurrencies other than bitcoin) designed to be "ASIC-resistant" e.g. by using the Lyra2REv2 algorithm.*
This is notably the case of Monero and Monacoin, two popular cryptos in Japan. Generally, the Japanese and Koreans are very enthusiastic about cryptocurrencies in general.
Cryptocurrency GPU-mining on Tesla cards would be outright unprofitable.
These facts may contribute to Nvidia's decision not to displease Japanese GPU miners specifically.
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* This is to avoid big ASIC farms as is the case of bitcoin (apparently, more than 70% of bitcoin's hash rate comes from China, most notably from a specific valley where electricity is dirt cheap). One purpose of ASIC-resistance is to maintain a high-enough degree of decentralization in mining, which increases security for the network/blockchain.