Why I must mining CAT with so unfriendly retarget? When I start mining with constant hashrate and solve several high-diff blocks, jumps out multi pool and take all low diff blocks.
All you demonstrate when you ask that question is that you don't understand chaotic systems. Also... All coins have a profitibility window. When a coin is profitable to mine, profit-switch pools jump in. That's what they do. That's why they exist. They're a fact of life in this world, just like rain IRL.
Why should miners support the network? Because 24/7 hash keeps the difficulty higher - and that keeps the diff at or above the profit-switch pool's trigger point. 24/7 hash also keeps blocks flowing more smoothly. You understand this, yes? Oh, also - miners support the network because they're paid to.
PS - I killed the high blocks. You're welcome. ROFL
ETA...do a paper exercise, Vampy, with whichever coin you want. Even BTC. Hit it with a huge profit switch spike that doubles the difficulty and then pull off and watch. What do you expect to see? Difficulty adjust algos must raise the diff when blocks happen faster (analogue for increased hash rate) and must lower the diff when the average block time exceeds the target rate. It's what they do.
https://bitinfocharts.com/comparison/bitcoin-confirmationtime.html#3mBitcoin's had some multi-hour blocks - and averages more than double the 10 minute target. Keep in mind that mining is based on the seed from a random number generator. Sometimes RNGesus is happy, sometimes she's not.
Also, to directly answer your question: "Why I must mining CAT..." You must mining nothing. You also must posting nothing. There is no must. You either choose to because you want to support the coin, or you choose not to. But if you choose not to, you don't need to pee on the carpet because you understand that life's too short to troll when there's a more productive use of one's time. Cheers.
