The problem is that 300 satoshi per mil is barely profitable for someone who is doing the mining. Anything less than that is only profitable for who hosts the pool, for the miners it's just a waste of time and money. Now if you dont pay for electricity is one thing, but if you do, then it's stupid to invest in something that doesnt pring anything back, unless u just love paying for your computer to mine.
It depends if you look for profitabiliy in short term or long term. Short term profitability is long gone, I don't think it exists anymore.
Infact I don't look for profitability in short term, I take for granted that I'm mining on loss for 95% of the times/coins I pick. So I don't expect to pay the electricity bill with what I just mined the very last month.
Instead, I go for the long term, I know I'm mining at loss now but I hope that BTC will gain a lot more value in the future so what I mine today will be a lot more valuable in 1-2 years.
Tomos instead is enjoying his holidays with what the people are still mining with him lol.