RE:What do the big miners communicate?Interesting! That's why their hash rate to Bitcoin production ratio doesn't match up to each other - HUT was much closer. Basically chalked it up as MARA and RIOT constantly installing new miners on a daily basis and thus hash rate constantly changing.
Could be that MARA and RIOT are having cooling issues and thus can't operate at maximum capacity - RIOT recently announced that they're going to be using immersion cooling on a large scale.
Definitely more strong reasoning that indicates BITF is very undervalued.
All the best