Flowering clones can also buy you time and save work and expense when the outcome is uncertain, like pheno hunting for example.
I don't want to be looking after 15/20 vigorous growing clones when i know most of them will end up in the bin.
Cloned taken wk 4/5 take long enough to re veg that the mums have flowered and dried, tested around the time the flower clones are really re vegging, it's a effective labour saving method the clones are doing nothing for most of the time.
There's other benefits to flower clones, imo the overall growth style and shape make them well suited to being short mums, then for flowering...well you just need to look
@Fatjoe crops they're top drawer!