If you publish using DM’s Guild you are are the tenant in a digital sharecropping scheme.

By publishing on their platform with it’s attendant licensing agreement, you are living on their land. You paying for that tenancy with your creative work. You make content and can only sell it on their platform if it uses their IP. On one hand, you get access to a large market and can make more income that way. On the other hand, WotC gets the majority of the actual value from your work.

It can be very positive for you. If you depend on it, you can be wiped out if they change the terms, decide your content breaks some sort of new content standard and block you from the site, go to a new edition and old content isn’t in their interest, or simply decide to shut down DM’s Guild.