"Is Paid Book Marketing Worth It?"

Hi fellow authors,

I’m debating whether to invest in paid affordable Book Marketing services. I’ve been managing on my own with mixed results, but I’m not sure if hiring professionals would provide a good return on investment.

Barter. Books Publishers offers tailored marketing solutions, and their reviews seem promising. Does anyone here have experience working with them?

What’s been your experience with paid book marketing services? Is it worth the cost, or are there free strategies that work just as well?