I can't comment on usefulness to professionals and academics or overall value for money, but it seems to me that there must be a role for raspberry shakes to augment the relatively sparse national networks. They are relatively cheap and from around 1 to 50 Hz have been shown to produce good data.

The advantage of the raspberry shake is that it is in Constantine, very close to the earthquake focus. There is only one nearby publicly avaliable seismometer, the BGS broadband station at Carnmenellis. Avalon have downhole devices nearby at Rosemenowes Quarry. I suspect they collect the best data.

On 2024-01-28 BGS Seismology reported seven earthquakes at Constantine, Cornwall, UK the largest being a M1.6. Using Obspy cross-correlation, with the largest two events as templates, I identified 20 events on Raspberry Shake RD884. A swarm of earthquakes also occurred at Constantine on 2023-02-24.

Section from today's M7.1 earthquake in Vanuatu, with responses from the worldwide @raspishake citizen science seismology network. For more information see: earthquake.usgs.gov/earthquakes/....

Section from the M7.6 earthquake in Mindanao, Philippines at 2023-12-02 14:37:04UTC recorded on the global Raspberry Shake citizen science seismology network. See: earthquake.usgs.gov/earthquakes/.... Uses obspy and matplotlib libraries.

Responses from Sunday's Magnitude 2.7 earthquake in Mount's Bay, Cornwall, UK. Recorded on British Geological Survey and Citizen Science Raspberry Shake seismometers in Cornwall. The UK has relatively little seimic activity, so this earthquake made national news: www.bbc.co.uk/news/article....