In my opinion, at face value, it reads that you need to make 10 posts
for your forum links to be counted. It doesn't say that forum posts are required for other tasks to count.
For the Week 2 we have the additional requirement: you will need to post at least 10 messages before the next round for each of your forum's links, otherwise those will not be counted.
The original requirements never specified that you must have "forum links" to participate... they were just one option of many... like tweets/retweets/blog posts etc. So, if all you did was use Twitter, you should still have been given the appropriate number of stakes (ie. Like a post: 1 stake; Retweet a post: 1 stake. etc)
If that is not want blenderio meant, then the requirements (original or additional) should have clearly stated that you needed to complete ALL the tasks to be eligible... or at least that forum posting was a "compulsory" task and if it wasn't done, then none of your tasks would count.
As QS has mentioned, it
might just be a language issue and failure to communicate clearly... but it certainly does seem that they just decided that they didn't get the advertising they wanted (10 posts per user per forum) so they decided to cancel it... Which, seems a bit unfair to those who did complete the non-forum posting tasks in good faith.