In Electrum it is very simple to do it. Just click in the Coin tab and choose which UTXO you want to spend (each of those dusts are going to be one UTXO individually).
Or just freeze the address if you're lazy and the address only contain dust. Additionally you remove the risks where you might forget to manage UTXO properly
Most cases Ive seen this happening was for deanonimization or advertising purposes.
I doubt it's advertising purposes as only blockchain.com which show tag/description of an address and AFAIK they make such advertising attempt harder