But there is so much more you can put there.. mine has:

Kids sticker my daughters put there, cartoon like power rangers(some new one but same concept) Trail running club that I ran some races with Some star wars sticker Friends startup company Postgress meetup(cool design) Few coworking spaces I been to Muai Thai stadium in Bangkok Couple conference stickers(swift and ml) Running sandals that I like Couple ski resort stickers that I bought for my kids and they put it on my laptop Climbing festival Canadian Alpine club

Only one that is company advertisement for free is Mammut outdoor brand. I really like their branding for whatever reason, so I have few of their things