Could somebody please provide some context?
tip4commit is one of a number of services which, without asking for permission or notifying you, opt your projects into a BitCoin-based crowdfunding system. Even if your project doesn't want it, even if your project has its own donation/support system you'd like to send people to. Historically they spammed committers of force-opted-in repositories with an email on every commit to tell them what their new BTC donation…
Deal with the issue some other way. There are unethical people out there who want to make money in crafty ways.