I paid the full $240 for a plat 3 to diamond 5 boost. After several days and a few loss streaks, op is stuck at plat 1 and unable to boost me to dmnd. No hard feelings but I am still awaiting the $90 refund. I'm currently on my phone and I can post screenshots when I have access to a computer.
Edit: Finally refunded the $90. Overall would not recommend for plat+ boost