I don't know how long (heavy) the service drop will be, but if the support was attached to the house instead, there should be no problem. Among other things, those LBs look to be aluminum, I wouldn't think the hub would hold up to any appreciable weight.
As shown, the conduit would probably be considered a mast.
In that case, it should need to be at least 2" diameter and installed with approved mast fittings.
