Getting comments on Facebook/Instagram ads

it slike writing reviews - its for consumer to make it look good and buy your products

Fake engagement can disrupt your target audience if you're running ads. Facebook prioritizes real users and genuine interactions. When these fake engagements appear on your ads, Facebook may distribute your content to fake accounts, causing your ads to become costly while bringing little to no real results

In my experience, ads work best when the comments are genuine. Encouraging real users to share their thoughts or feedback is much more effective than using fake services.

I think it only works for the algorithm, but not from a potential customer's perspective. You need real comments sharing experiences, that builds credibility and attracts actual clients.
I'd recommend that if you plan to use these types of services, go with microjobs since you can be specific about the comments users will make, as well as specify the profiles of those commenting (freelancer's country, number of friends on the accounts, account age, if you only want women/men to comment, etc.). It's more personalized, I do it through sproutgigs.