Analogue's products and the MISTer are for two different audiences. Personally I own both. Any hate in either direction is unnecessary and if it exists I hope those who harbor it can heal. To often we see fighting among people who are really on the same team but don't seem to realize that.
Yes I like OSS, but I also respect the decisions of those who choose to keep their code closed. Kevtris has made significant effort to give as many people as possible the ability to use his cores. If the deal with Analogue had never happened, and Kevtris decided to release his cores for the MISTer, do you think more people or fewer people would be using them today compared to the current situation? While I like the long term preservation that OSS offers, and I would like to see further development/bugfixing on the cores that run on the NT-mini/S-NT, the current scenario allows for more people to get to enjoy those cores and gets Kevtris paid.