You have no clue. Let me educate you. 1st depends if you are a grinder or just in it for action trying to make a big score. Obviously, if you are a grinder max out on all of the books opening bonuses and shop best lines. If in it just for action and going for the big score than:
1st sign up for a few BMR books through their link if you haven't yet.
https://www.bookmakersreview.com/best-sportsbooks/
Start with at least Bookmaker, Betonline , Bovada, and Betallsports and rotate your deposits so you always have fat bonuses available until they cut them from you.
At BAS you take the reduced juice ALWAYS so it is locked in your account after your initial deposit bonus at BAS. BAS will send you "welcome back bonuses" after your account has been vacant. These have no affect on your reduced juiced and are always in the form of free play. Reduced juice doesn't mean as much to me because I never really bet pre-game but you want it available if you switch up your style.
Bookmaker will have a tier level in earning points and a set CASH reload bonus. It has gone down over the years. I signed up through SBR link so I only ever got the original 100% starting bonus. Football season they will also add 100% bonus that can be used for a few weeks only and up to maybe 7 times.
Justbet I signed up through the BMR link. This is why I say make sure you do it. I didn't reload upon sign-up. 2 days later I got VIP email/text. That gave me multiple 100% FP bonuses. They do run out but like BAS if you leave account vacant than can get them offered again reaching out to that department. I never got that through the SBR link with Bookmaker.
Betonline and Bovada have the most perks of any of the books. BOL is very strict with their FP though but they give you so many other freebies and have great juice and almost immediate payouts. Bovada sign up for their crypto only option in the beginning and you will not believe all the perks you get WEEKLY and CASH offers. Now some stuff will go away when you make that 1st big withdraw but they give you so much to play with to get you that chance. Downside their juice is higher but they offer so much more on their live platform BUT it doesn't have that option to not take bet if it goes against you. I have had it take a worse line but never a better. They have tons of bet points you earn as well. Even after you think your account is bust it isn't. Log in each day as they throw a bunch of betpoints your way after going busts and they also send you a bunch when they have maintenance issue. Your weekly crypto exclusive will go from 50%. If you don't use it than 75% the next week and it will keep going up and have seen 125%.
I only use those 5 books. Wait for the bigger bonuses at BAS,JB, and Bovada and hit BOL and BM for regular small deposits in between. I grow tired of grind the past few years and only reload when I want action. Go bust or withdraw in 2-3 days.