The sticky cards attract a lot of the bad bugs like leaf miners, whiteflies, and aphids.
Hopefully, Marsha will chime in. She is an expert in all things tomato.
Since I've been using the sticky cards, I rarely see any leaf miner squiggly lines and when I do it is b/c the card is so full or not near the leaves. I also haven't had any white fly issues.
Here is the only good brand to use outside in Florida. (The others are heartbreaking).
https://www.amazon.com/Yellow-Sticky...w+sticky+traps
The potting mix is very expensive where I live; Miracle Grow is about $14-15 so for $42 I can go pro-mix and get the same # of plants.