Hi @mightysprite first if you want to enjoy Eco Pack turn off the NAPs autonomy and repeal the ones are already active in your game! Eco Pack is good, the Community Lots are one of the best Lot Types of Sims 4... but the NAPs were really bad executed :s Not only they can mess the gameplay but you can have real issues ;)
When you create any lot you need to remember that there is a Sims limit (20) at any lot (counting those outside the lot, walking down the street, chatting, etc.). So the more npcs you need to use the stalls, the sales tables, etc... the fewer sims for other activities are available. For this reason there is a limit for how many npcs will arrive to your lot.
Also not all the stalls work at any lot: usually they are coded for certain venues or worlds. It is better to use Stalls from the build catalogue, NO from the debug stuff.
In my experience only the stall from Eco Pack, any bar, any sales table and the Street Gallery works at a Marketplace.
I built and play my own Marketplace: I created it for my gameplay, I like busy lots so I try to minimize the use of npcs. I'm a rotational player, so I want to see my own played sims doing activities. I always build with functionality as a goal:
Here are some photos of my Marketplace, it works great for me. BTW the tables sales vendors are different everytime I go to the lot: sometimes they sell candles, fizzy drinks or collectables:
https://i.imgur.com/Dtjar9d.png
https://i.imgur.com/QlD6rhh.png
https://i.imgur.com/Xojbeg7.png
https://i.imgur.com/sl8S9Qt.png
https://i.imgur.com/Dr07Mhf.png
They are sims everywhere. Lots as the one from Eco Pack are coded to run manly the Eco gameplay. If you found a good layout and balance of activities you really can enjoy it o:)
Here is the gallery link of my Marketplace, hope it can help you to built what you want (no CC):
Port Promise Marketplace
