My personal opinion:

I think you should pause the twitter campaign after the threshold of the initial announced amount is reached.
It may have been a good thing, which can be used again in the future. But I personally don't think something like this should last longer than a few weeks.

Its always very difficult to measure how much marketing campaigns actually support or aid the advertised product, but it was good to show some more presence on twitter.
In the future, there has to be also tweets about moin without getting rewards from here. I would love to see that evolve in the near future.

And again, stopping here now doesn't mean it can't be started again at some time.

just my two cents..