it is not just privacy reasons, there are more to reusing the same bitcoin address more than once for receiving multiple deposits. for example the biggest problem most people will face these days is the higher fees.
read this:
https://en.bitcoin.it/wiki/Address_reuseThe fee problem is still a problem no matter what you do with your addresses. It's all about the quantities you are holding on said addresses. For example, people asking for donations have told their viewers/fans/whatever, to not send small amounts of BTC, because this creates a ton of inputs. It's better for them to save money and send $10 or so per transaction.
Tone Vays for example, told this to people, and also started accepting Litecoin donations because recieving small transactions in bitcoins is a mess until we get segwit and lightning network.