This is for the arena haters. If you're an arena grinder, this message is totally irrelevant to you, unless you know a lot of arena haters.
I get it. Arena is boring, arena is dull, arena is time consuming, arena is soul destroying. We who grind arena are a different species, and it probably isn't even a human species. Fair enough. But some time in the next few days, grab a -pool (Deadpool, DeadpoolX, Gwenpool. Goldpool, Masacre, etc) and do one arena round in any arena. Just one. You don't even have to win all the fights. Win the Deadpool fight, and quit the rest. Get the one point for the Oversaturated Market.

A million gold and a crystal that contains units for literally one fight. As far as I'm aware there are no rank reward gates: everyone who participates is guaranteed to get at least this. The reward/time ratio here is about as good as it gets.
But there's more:

Most of the rank rewards are percentage based. That means the more players that participate, the more players that will get every reward. Every three players that does just one fight will mean one more player getting three million gold instead of two million gold. Every five players doing that one fight in the arena means one more player getting four million gold instead of three million gold. When all is said and done, every player that does just one fight in the arena with a -pool and scores a single point in the event not only generates one million gold for themselves, they also generate about 1.1 million more gold that goes to other players.
Over two million gold generated by one fight. Half to you, half to some other players. Plus, some random amount of units, both to you and to other players.
If you want easy rewards, and also want to give other players easy rewards, grit your teeth, hold your nose, and do the one fight. When Kabam puts rewards on the table, and you can both grab some and toss even more to other players, and it costs virtually nothing to do it, take them.