The short answer is yes, bitcoin mining pools are profitable. However, there are a number of factors that can impact your potential profits, including the size of the pool, the fees charged by the pool, and the difficulty of the mining process.
When you join a mining pool, you are essentially pooling your resources with other miners in order to increase your chances of solving a block and earning rewards. The rewards are then distributed among the members of the pool according to their contribution.
Generally, the larger the pool, the greater the chance of solving a block and earning rewards. However, pools also charge fees, which can eat into your profits.
The difficulty of the mining process can also impact your potential earnings – if it becomes too difficult to solve blocks, then fewer rewards will be earned overall.
Taking all of these factors into account, you can still expect to earn a healthy profit from mining if you join a good-sized pool and don’t mind paying reasonable fees.