If im not mistaken, the limitations of the read and write for PDS is across the ENTIRE project. so, its 1k per minute for every user at once.
Lastly, the player that can cheat that is randomly chosen can still easily tamper with the values of the game and hack it. If its a pvp game, what stops them from using cheat engine to rewrite their score to a higher amount? lower the enemy score? infinite time? infinite resources? a server has TOTAL rule over anything, and youre giving that to just any client.
Like COD lobbies in the past, they are very susceptible to cheating, so be very careful!
If you want to use the Gold Standard for database management and dedicated server fleet, the answer seems to be AWS with its Gameflight system.