Useful for probing short timescale propagation. WSPR needs 2 min, FT8 15 sec.? Sporadic-E often fades very quickly :-(? Tropo is more likely to support WSPR.
FT4 as well !?? (might also catch some meteor-scatter, aircraft-scatter)
Multi-mode beacons are more efficient as they can reveal differing propagation conditions.?
Sometimes WSPR is "better" than FT8, sometimes "worse", depending on the timescales involved in the propagation mode.
The more beacon-ing modes, the better :-)? Regards,? Ed? G8BQR
