Earlier I activated all the events like I said in my previous post. The events can be activated only once every 4 days so I couldn't wait to finally start them all again.
The thing is that the Art Convention event didn't activate and I don't know why. Every other event worked perfectly - I even started the Science Convention event to test it all out, but unfornutately even after many tries the Art Convention event didn't want to start.
It feels like the game took my CCC tokens, but it forgot to activate the event for me. On Hive-Engine's history it's saying that I need to wait 95 hours to organize the next Art Convention so the game knows that I sent the tokens, but it forgot to give me the bonus - I only have 5/6 events activated.
I am not sure if this is just a user interface bug because I am receiving some artist cards, but it's hard to know if they are coming from the Weed Fest event or from the Art Convention.
If you have time, could you check it out 
Did this happen to anyone else?