Character shard drop rates

At a 10% drop rate with 5 cantina refreshes, you're still earning at most 10 shards a day...so, spending 500 crystals a day for the 30 days it would take to get 7 stars, that would be $100/month. How is that fun? All it does is bore or over charge people into quitting. I am by no means saying that the game should make content completely free, it deserves to make money. I'm only saying it should have reasonable reward ratios to cost. There are several bottlenecks already....ability mats, zeta mats, raid gear, credits, etc...Farming characters is one aspect of the game, they could give everyone all the characters at 7 stars and you'd still spend several months(or longer if you're not in a powerful guild) upgrading a single full squad to max gear. This is not even considering new character releases and new features(like ships), which contribute to longevity.