Apart from the use case that you have mentioned, there is another little way this can be helpful to users.

If any startup/side project is putting effort in Twitter, it is safe to assume that they will tweet at least 200 times a month (the number of recent tweets that this app searches). With that, users can check every month how their avg. likes and RTs are increasing (engagement level).

It would be useful to show Total likes and RTs for each source device, possibly in the line next to average numbers because most people are likely to average between 0 and 2 when they are starting and this is not encouraging.