Brian and Daniel discuss the cost to submit an operation to the public ledger on the open and inclusive Stellar network. They provide their take on whether validators should approve an increase in the current minimum fee of 100 stroops - about one millionth of a dollar when XLM is valued at ten cents each.
Fees on Stellar are used to economically discourage spamming the network so that the open network can remain healthy and efficient.
Read about the issue and pigeons in the Stellar Development Foundation's blog post "should we increase the minimum fee".
Read the Google discussion on this issue here and the Reddit discussion here.