If you played 25 hours in 2 days, i.e. 12.5 hours per day, you're the exception, and should probably stick to 3-day boosters, or 2x 1-day boosters. Note: You should probably also find something else to do, than spend 25 hours over 2 days playing a single video game.

As for me, I would start a 7-day booster sunday, cap (hit the max Bonus SP) by Wednesday morning, then hit the next cap by Saturday evening, getting 2x Bonus SP+booster over the duration of a single 7-day booster. This, btw, is the most financially sound approach, unless you can hit cap in 24 hours and use a single 1-day booster (or in 2x36 hours, with a 3-day from Tuesday morning to Thursday evening).

Note: You're still getting 50% on top of your base SP after hitting cap - after cap, you're getting SP = WP, up to 1000 SP, which then reaches 1500 SP with an active booster.

I am only gaining 1/10th of the SP I was Originally gaining

I hear ya. I think a lot of people complain about this. If you've paid for a booster, then it is irritating when bonus SP runs out and then your booster (based on percentage) looses its performance. A lot of people get around this by buying a 7-day booster on Sunday. They cap out from Sun-Tue and then after bonus SP is refreshed on Wed, they cap out between Wed-Sat.

Just get the 30 day boosters and stop worrying about it.

If you play 20 extra games per week after capping and hit the 1,000 wp maximum, you will gain an extra 10,000 SP per week with an active booster. If you play more than obviously you would earn more, but an extra 500 sp per game after capping does add up over time.

so now comes to my question, what's the damn point in any Active booster over 3 days?

If you always want to have both boosters (Active and Passive), you are best off buying the 24k pack that gives both a 30 day Active and 30 day Passive. The price is the same compared to buying a 30 day Passive and buying four 3-day boosters to cap a month. If you don't want to run Passives, 3 days boosters have the least 'waste' if you can cap out in two or three days.

SP Rollover needs to happen. It will make the longer Active boosters more useful in the end.

This is CCP's way of saying get a job

Hmm, according to DustBoards you were born this last Thursday. So I can see you're pretty new here.

Honestly, the issue is not the SP cap and it's certainly not the boosters. What I see here is that your case is another case in a long string of similar cases that underline the biggest issue surrounding Dust 514 at the moment. The flawed new-player experience (NPE) or lack thereof.

You obviously didn't know that there is a weekly SP cap which was requested by the community back during closed beta in order to inhibit any attempts to max out the game in a ridiculously short amount of time. We obviously don't want to see new players go proto-everything in just under a month, now do we? No. No we don't. That may seem like a positive thing for new players (no SP cap) but it's also a negative thing for the new players since that would mean veterans will be even further ahead than before. But this is something I feel you should have known about this from the start via some in-game tutorial or some sort assuming it's in there somewhere. But even then, again, this just points out to all of us that CCP needs to overhaul the NPE so that new players like you would then know from day one about something as mundane as the weekly SP cap.

This is one reason people run alts. When I cap out, I switch characters.

This is one reason people run alts. When I cap out, I switch characters.