why are tickets so cheap now? they use to go for 100 each

because they cracked down on 3rd party trading, and people were getting banned left and right so its much more risky

so shouldnt they be worth more for the risk?

No. The mtgo game is also dying since MTG arena is the future. Whether its MTGA or just people panicking, theres no doubt that the value of cards has declined by over 50% in the past year (The cost of the complete collection is half the price it was). And even ticket buying 3rd party sites are offering less and less each month for tix.