Comment Re:I must not be getting this.. (Score 1) 301
using some algorithm I'm currently unfamiliar with so will not bother to explain in detail but the point is it exists, take a share of the transaction they facilitated as a "transaction fee"
The sender in the transaction specifies the transaction fee. The wiki has more info.
"the person attempting to make a transaction can include any fee or none at all in the transaction. On the other hand, nobody mining new bitcoins necessarily needs to accept the transactions and include them in the new block being created. The transaction fee is therefore an incentive on the part of the bitcoin user to make sure that a particular transaction will get included into the next block which is generated. It is envisioned that over time the cumulative effect of collecting transaction fees will allow somebody creating new blocks to "earn" more bitcoins than will be mined from new bitcoins created by the new block itself. This is also an incentive to keep trying to create new blocks even if the value of the newly created block from the mining activity is zero in the far future. "