It is really nice that the system is free up to 3 rigs, but I really think you do need to make a distinction between your paying and non-paying customers. Perhaps some sort of support level agreement would also be beneficial, but it all depends on Hive’s team business development and strategies. As for knowing which miner is popular, i think a look at every pool’s (at least YIIMP style pools) will give you any current popular miner for specific algorithm, here is a look at https://bsod.pw/site/miners and you’ll see tdxminer is on the second one. Lolminer and that entire coin (minexcoin/mnx) which i believe is some sort of a scam anyways, is a special case. A general rule of thumb would be for example that if a miner only supports “one specific coin” then it probably shouldnt be in your list of priorities.
Finally and as far as a am concerned, i dont think the tdxminer was a bad story, for me it was a learning curve and i got to know your system a little better and it shows that we can make HiveOS stronger with the community’s support and input.