Sometimes the way that the sponsor logos look on the dashboard are blurry. If this is the case for you, try viewing your event on your app.
You should also make sure that the logo is close to our recommended dimensions as well: 700px x 210px (Max 1000px x 1000px)
They should look clear on the app. If for any reason they are not, please contact your customer support specialist or email us at firstname.lastname@example.org.