Since the move to a dedicated place in March 2017, I tried to keep the Mix Challenge homepage and forum ad-free. Reason being, that the old place was fairly overloaded with advertisements (which also made it a bit slow).
In turn, the Mix Challenge tried the Patreon / Donation drive route, to keep things running and advertisement free (except for the License sponsors, of course). I had hopes that this would at least cover the minimal maintenance fees/expenses (that I currently pay myself). However, this sadly still doesn't cover at least the server costs, and we're also far from serious/simplified Social Media automation. The latter eating a lot of my spare time for preparing stuff several times a month, on top of the currently already existing workload "behind the scenes".
Let me state at this point that I am more than grateful for all Patrons, investing their hard earned money into this community. I can not thank you enough for this. Every penny counts to keep things alive and running. As of the moment of this post, the monthly financial support via Patreon is roughly 5,80USD (incl. all fees deducted). However - that's less than 1/4th of what is actually needed to keep at least the basic gear box running and greased.

The plan is, to implement them sometime ...
(edit: date redacted, I try to run this place as long as possible without ads)
But before everyone is up in arms about this, let's take the wind out of your sails...
- yes, we do have license sponsors (once more, a huge thank you to all companies), but they do not offer "financial sponsoring" as well
- the ads are planned to cover the basic maintenance costs first and foremost, every penny counts
- planned ads will be handled in a decent manner (current idea: only in the header and the footer section)
- there will be no "page-wide blockers" to restrict your access to the page, as I highly dislike such schemes myself (especially at news outlets)
- there might be a possibility to unlock a "clean forum skin" for you to select via the user account in turn for a certain amount of monthly donations (e.g. via the "Donation Hall-of-Fame") - however, this is a topic up for debate
I am being honest with you on this part. I am not making any money off of this - at least not in the short terms of things. In fact, neither of the staff did since the existence of the Mix Challenge in the year 2014. We all worked out of out spare time, free of charge.
As you know, handling the community is currently a one-man-show, and in Q4/2017 I sometimes invested (up to) 50+ hours/week of unpaid work into this! So please, once advertisements are implemented into the forum, and you enjoy what the community has been doing in recent years, consider not using an ad-blocker.
I'll keep you all informed on the status of this implementation.