Only in the last few minutes have I QSYed to 10m WSPR.
I was on 40m WSPR overnight. It was worthwhile even with 2W to the very low antenna on 40m (a 10/20/40m end-fed Par) at about 4m (at most) above ground. Several 40m WSPR spots received from the USA overnight, although none from South America.
Since daybreak, just Europeans and G stations spotted and spotting me on 40m WSPR, although W4MO (7272km) spotted me as late as 0748z.
UPDATE 1005z: No spots given or received yet on 10m WSPR.