Bro, regarding your post, if you are running a brand/blog for Men’s Fashion and Lifestyle, then invest that amount for giveaways, I’m sure you can get good Instagram followers for that. You can spend a little bit on Facebook ads to get 1K Facebook Likes for your page.
This is how I’ll spend 10K on Social Media:
Purchase something in AppSumo and conduct a Giveaway.
Buy some trusted gigs on Fiverr for creative materials.