None are mining, and WTT batches are not necessarily connected with equipment buys anymore. According to the latest official information, early buyers should start mining in the next few weeks. For others it would probably be Q1 2018 only, depending on their queue in the mining deployment schedule. But there are several delays.

Please keep in mind that you need both, WTT AND equipment to mine with GW. Just the tokens will not mine anything, but you can rent them out.