Nice, we have similar stakes at spl lol, I'm always holding around 7k to 8k sps and re-roll rents and sps rental to play modern... But also owns U$130-110 in cards. A gf Immortalis lvl 3 gives 58% APR (112 dec) and pays 20% of my card cost... I had a good amount of cl but sold most due to be near rotation.

I got into modern top 10 at some point using some few key untamed and full cl, and closed at most 30, but just turned way more tough against rebellion and tactics...

So my strategy is that I don't hold any risk and yield it's around double of my cost, including 2.2k dec weekly for 320k sps, giving 12x-10x from champ II-III. So I use for cash flow, if everything goes up so my weekly differential yield... I like to call it "current liquidity ratio > 1", if were to use some accounting indicator. It takes 5 min / weekly to renew bids, but some 2hrs/day playing...

It's not much but honestly, it's similar to a brazilian wage by time spent lol, I get to do something that is nice and scalable, win-win.