We don't have marketplaces for specific LSPs and hosted channels yet, but I can see places like Amboss, Lightning Pools and Lightning+ liquidity marketplaces allowing for people to post liquidity ads and source customers and wallets could tap into these APIs and offer it to customers.

Wallets could set rules on certain requirements to get access to their userbase or people could bypass and pick their own

At least that's how I see it forming, but nothing concrete yet