How are banner renters selected and can they be trusted?

So with the recent addition of companies and projects being able to rent the r/cryptocurrency Banner for promotion, I was thinking how do we know that these companies are trustworthy.

So to the mods of this sub can we get the process of how you determine who's eligible to rent the banner.

Do you guys do research into these companies to make sure that they're not bad actors in the space?

Or can anybody just pay the fee and they're able to rent it?

What happens when there is more than two companies or projects interested in renting do you have a bidding war?

Or do they just get added to a long list of queue?

Just asking this question because I would hate to see one of your sponsors end up being a bad actor and then everybody turn in the hand to read it saying they had a role in it and they promoted a scam blah blah blah blah blah.

Not that any of the purchasers yet have brought any concerns to me it was just something I was thinking about it was just wondering the process of how you guys determine who is allowed to bring your banner space.