Newbie

Only ways are buying SQ, daily logins, monthly five tickets from shop, weekly missions, events, maintenances, and first time clear rewards. People with a lot of tickets just save them up over time

Besides main quests and free quests from singularities these are the ways to get SQ and tickets as a ftp player:

You can get a set amount of Tickets (10) each month from the mana prism shop.

You also can get 2 SQ per week from doing all the weekly quests.

You get SQ and tickets (equivalent to a SQ a day) from consecutive logins. Every 50 logins you get 20 SQ.

You also can get SQ from interlude and rank up quests. These appear as you level and ascend servants.

After bond level 5 you can get SQ by increasing bond with your servants. Lower rarity ones often give apples instead but higher rarity servants give SQ. Here is a break down of bond rewards:

https://fategrandorder.fandom.com/wiki/Bond_Points

You will also get SQ or tickets from events and as an apology for maintenance.

I personally have been saving since January and currently have accumulated 300 sq and 50 tickets from all of these methods.

Tickets and SQ are a fairly rare commodity in relation to the summon drop rates. So people tend to save them up until a servant they want is featured rather than rolling at every opportunity.

Just play the game. Finishing missions, log in every day, and grab the tickets out of the monthly shop. Those are the primary methods of acquiring tickets and SQ.

One thing to add is that folks streaming on YT are more often than not whales (or maybe dolphins, if I get the terminology right). Unless you're going to follow them and spend thousands of dollars (or your equivalent), don't fall into the trap of believing that you will ever have their lineups. At an average of one SSR per 300 SQ or the equivalent, you're just not going to get a lot.

Not sure if you were mistaken or not about summon tickets, but whales probably do 10-rolls most of the time. Maybe they just don't bother that much with all the singles they accumulate? That's just speculation though. I don't see why they wouldn't use them first like most of us :)