Everything in the JW organization is tailored for obtaining new members. Do the math yourself and you will find out that's where it all leads to: getting more baptized members. Baptized members are expected to donate; it comes with the territory. So naturally more baptisms equates to more donations at the meetings and the conventions.
This is just the basic religion scam and the Witnesses are making good use of it. They do have one large difference between most other religion scams. They discourage furthering yourself in this world. For instance, that's not how the Catholic Church works. They want their members to make more money because the more their members have the more they have.
So why does the Watchtower discourage acts from their members that would be profitable (like getting a higher education, pursue sports etc)? You better believe that Witnesses who make a ton of money are going to donate a whole lot more. Well the fact is, the Watchtower doesn't really discourage being rich even though they try to make it look like they do. What they are really hard on is education. Education is far more dangerous to the organization than rich members. I have been around lots of fithly rich Witnesses and do you know how they got their fortunes? Markets that don't require a university education like construction. Many Witnesses own their own businesses and that is a sure fire way to skip an education and make it big.
Oh the Witnesses discourage working too much because they still need the indoctrination to be frequent, but they don't care if you are rich. In fact they secretly want you to be rich because they get a portion of your money. When it boils down to it if they get the money it's mission accomplished.
Secular education destroys Witness doctrine in every way shape or form. So the Witnesses are going after it now and have been since Rutherford came in I think. Stupid people are easier to extort money from so that's the Watchtower's extortion model and that's why higher education is their enemy.
It's also important to note that there is another factor as to why the Watchtower discourages education. The time factor is actually very significant. The Watchtower craves your time. Because once you give the Watchtower your time you give them opportunity to do their "razzle dazzle" stuff with you. So naturally they are going to highly discourage anything that takes the time you gave to them to someone else. Giving the Watchtower your time is like letting a shark sniff some of your blood droplets.
The Watchtower is the red-headed step child of the world's snake oil scam artists. They make it hard on themselves with their burdensome framework of keeping their sheep dumbed down and busy while they politely ask them if they can go through their wallets. The big flaw in their approach is that people typically are not going to fall for such a simple scam forever. Which is another reason why they pump resources into the preaching work because they need to replace the people that are leaving, droves at a time.
-Sab