I'm just lashing out because I feel morally inferior, in the case of the people tipping more frequently and generously in the first place, and fiscally inadequate, in the case of Mr. I-add-100%-and-then-round-up-to-the-next-50$.
To answer your question, I am helping people by staying at home and trying to follow CDC recommendations if I do have to go out. I have not changed my philanthropy habits during this crisis so far, though, if that's what you're asking. If and when I do, it will not involve helping out the few people who still have a job by tipping more.
All that said, I am by no means criticizing anyone choosing to tip more people and/or in higher amounts. Just because a donation could have been used to achieve a greater benefit had it been used for another cause does not mean that the person giving it did anything wrong.