To be fair, at least Heart Botanic and Skye are SL brands.
And there are many beaches in OpenSim built with pieces from the Skye kit that have been copybotted at some point in the past. You can tell this from three things: One, the pieces are full-perm which payware shouldn't be. Two, the sim owner obviously only has one or two different pieces in their inventory. Three, the sim owner obviously doesn't have any readme that must have come with the box either, telling from how they've used these pieces ("shelf beach" for example).
Now, I guess since this kit is available in OpenSim, hardly anyone would take the risk and steal them from SL.