|There are many logos belonging to third party publishers of DM's Guild products but only THIS can be on the product's cover as a logo. Branding for third parties? The horror!|
In any case, the only logo allowed on DM's Guild product covers going forward (prior are grandfathered in, which leads me to believe the prior terms weren't the clearest) is the one pictured above.
Which really sucks for those that have established (or are trying to establish) their brand on the DM's Guild.
Fantasy Grounds compatible products CAN have a FG logo, but that isn't actually in the TOS right now. Yeah, a bit of a cluster.
Yeah, I'm actually going to point you to the comments on ENWorld for this. There are some not so happy campers. The other Community Content Partners at OBS should take heed of changing terms in a way that discourages some from using their platforms to publish content.