you can sell a asset for 1$ if the target is 100.000.000 users and you going to earn more money than sell it for 100$. that concept works fine in ex. steam.
but the target audience in UE4 are unknown (for me at least) and the purchasing power of most users, then you spend lots of hours and you want at least got payed for your work and hours spend, if you sell something for 1$ and only buy 100 users you perhaps lost time/money.
what i’am its would be good idea known how good work (selling) the marketplace.
if i see that “pack of materials” for 20$ and they sell 10.000 units, others providers can think if they sell another pack for 10$ they still got payed for their work because there are 10.000 users interested in a pack of materials, and they going to sell perhaps 20k-30k more if they lower the prices, then they adjust the price and can offer something at better price and know more or less their work will be profitable.
and if you see they not sell enough you can decide if lower the price for encourage the purchase or increase it for got payed.
but ATM the market its unknown.