Block 925380 is indeed tagged to solo.ckpool in the coinbase, and with the current subsidy + fees that's roughly a 3.17 BTC payday for whoever solved it.
From the BitAxe crowd people are estimating the winning miner was sitting around 6 TH/s or so, which at today's difficulty is "you should statistically wait a few thousand years for a block".
Some luck, indeed.
that reddit link is for a DigiByte block not Bitcoin DGB is a totally different coin with way lower difficulty so solo mining with a few TH/s actually makes sense there unlike BTC where you'd be waiting forever for a hit at that speed no shade though luck is luck wherever it lands