When they solve the proof-of-work, they broadcast the block
to everyone and the block is added to the block chain.
and the 92% of Bitcoin Core original client reject this block because his size is over 1Mb.
simple.
miners make profit
IF they build block with the "rules" of the relaying machine (the nodes).
if not, it's 1 miner
VS. ... the Bitcoin network (48 000 nodes).