These 2 may have different ideas, but they have a more planned set of rows. If god and titan have the same amount of rows, then that means donating for titan doesn't seem that worth it. Titan should have at least 1 more row than god, as it costs more than double god ranks.
Premium: 1 row Sponsor: 1 row Vip: 1 rows MVP: 2 rows Elite: 3 rows Supreme: 3 rows God: 4 rows Titan: 6 rows
How about if you're titan and you already filled up your player vault chest, can you buy more rows with irl $$? For Example: 1 Row = 5$ irl Or Naw :D
What about being able to buy/upgrade vaults with ingame cash. Each row being 500-1000$ for the free players too. Example: Free players start with 0 rows, can upgrade to 2 rows. Premium/sponsor start with 1 row, can upgrade to 3 rows Vip/mvp start with 2 rows and csn upgrade to 4 rows etc etc