Exactly this is the crucial point. Due to the fact that everyone is able to create their own titlepack, there are a lot titlepacks. But, unfortunately, it is simply not possible that each titlepack is played by a broad mass of players and thus, satisfy the titlepack creator's desire of a successful/popular titlepack. Do not get me wrong! I love all the custom titlepacks with its awesome & innovative game modes such as hunger games, speedball, Loadout mode compilation, battlepro etc. But the current playerbase is not able to achieve that.
Somebody could assume that a bigger playerbase could solve this issue (e.g. by the new universal demo), but I doubt that. The more players Maniaplanet has, the more custom content (here: Titlepacks) would be created. I am not a math genius but here is a little math example to make it a bit clearer, hopefully:
Current SM playerbase = 1p
Current amount of titlepacks = 8t
-> I chosed the 1 to 8 ratio because the playerbase is only able to play 12,5% of the current titlepacks actively (actively = a stable and high amount of players, e.g. always 70players). Obviously, the ratio is not really calculated to the real data of titlepacks and the playerbase. I would rather like to portray that the playerbase is only able to play a very few amount of titlepacks actively.
If we would multiply the playerbase by 2, we would get these numbers:
Doubled SM playerbase: 2p
Doubled amount of titlepacks: 16t
-> Keep in mind of my theory which I explained above: More players, more content (here: titlepacks) is created.
There would be still only a few titlepacks that would be played actvively (e.g. Elite) and the rest would be still spread among other titlepacks/storm modes. The most titlepacks would be still characterized by a low playerbase and as a result, empty servers. Well, there would be probabaly a few more actively played titlepacks than only Elite (i.e. Combo or joust?) but still the most titlepacks would suffer from the big amount of titlepacks compared to the rather low playerbase.
A few more consequences of the issue I've mentioned above:
+ Competition among the titlepack creators
Everyone wants their own titlepack to be popular. This leads to a competition among the creators and they will be eagerly trying to create the best titlepack. The more titlepacks are created, the bigger is the competitions among the creators, the better titlepacks would be created.
=> innovativity & qualitivity
- Frustration of the creators from less popular titleapacks & frustration of interested titlepack creators
Not everyone is able to create such a superb, awesome innovative game mode and would most likely not achieve success. Firstly, current titlepack creator see no sense to make any effort for their titlepack anymore. They lose their motivation and might give up supporting their titlepack. Secondly, players who are interested in learning the tools to create a titlepack might recognize that only a very few amount of titlepacks are actively played and lose their motivation as well.
=> Less activity
I will add more consequences if I come up with any good aspect

What do you think?
Regards,
Soprah