Question regarding the recommended frequency for skin radiance boosters.

I am looking into the Maypure Skin Booster treatment, planning to invest in my skin with the money I saved from my part-time job during vacation. I’ve heard that skin boosters like the Chanel Injection or Rejuran usually recommend a minimum of three sessions; will the effects wear off quickly if I only get one? I’m wondering if I need to get the treatment consistently every two to three weeks to achieve truly flawless skin, and how long the results last if I complete the full recommended session. I am hesitant to pay a large sum all at once, so I would like to hear advice from those with experience to see if three sessions are sufficient to produce satisfactory results before making a decision. Is it important to stick to the recommended number of sessions for effective care?