As you said they are both relatively 'young' in the current iteration and likely do not have the same level of RoI as more established players.
Vertical integration - initially - is one of possible reasons, the other being their relatively lower bargaining power vis a vis retailers. Probably too small to realistically rely exclusively on own boutiques, yet without the killer must have product forcing watch retailers to stock them come what may.
Now that the big brands are muscling in on the territory of the retailers these are harder pressed, and may drop the odd brand with low stock turnover.
So for Moser it could be doubly problematic if a crisis hits - consumers becoming more wary and the number of PoS dropping at the same time.
On the bright side, manufacturer boutiques can also make Moser more interesting to watch retailers due to lesser comparability and better margins, so who knows...
At any rate the current moves generate both publicity and awareness to an extent their advertising francs could not get them otherwise, so if no publicity is bad publicity, they may be on to something