Today social media spamming service Changetip in a bid to generate revenue from users is set to begin charging a one percent withdrawal fee. For Bitcoin withdrawals the fee is on top of any transaction fee required to commit the withdrawal transaction to the blockchain. Changetip has struggled to maintain its early momentum in light of the general human aversion to spam, and they have even gone so far as to employ a /r/Bitcoin moderator in an effort to avoid complete shunning.