What i'll said here is more a personnal view than the Nadeo one.
Even if Ubisoft is our editor and helping us a lot, it doesn't mean that Nadeo (well it's more a Nadeo Live topic for the marketing) can ask whatever marketing budget that "we" want. For example a TV ads is really expensive (for a 30" spot in 4 counties (France + UK + Germany + US) only once (and only on one TV channel) is more than 400k$ and it's the price without taking into account the production of the TV spot itself.
There is no magic recipe to make a game immediately popular (well i mean in few weeks) without an immense marketing push at the release of the game but that's not how Nadeo Live do. As Annki (Managing Publishing Director at Nadeo Live) explained (on an interview on the website Nofrag):
And as you may see, we are supporting several events across many countries and we are present on several shows/conventions (like GamesCom, Comic-Con, QuakeCon, PAX, etc)Nofrag wrote: [She] explained to me that traditionally the editors spend all their marketing budget in order to create an event at the release of the game to sell as many copies as possible and too bad is the sales are collapsing the next week. Conversely, Nadeo seeks to create a long-term relationship with the community which is slow and requires more time.
We prefer to be present over the time instead of once it's better for the long-term. But we're working on getting more people on Maniaplanet, don't worry about that
