I have two ideas...
Idea 1
I don't know if this is pushing it...but maybe we could add another level? Like say SRL New Member before Jr. Member or something. So SRL New Member could be like the Jr. Member system we have now (10 posts, 1 week of registration). Basically it would be almost the exact same thing as the Jr. Member system now. Then, at say 75-100 posts and 3 weeks of registration, there could be Jr. Member. We could encourage scripters to put nearly flawless scripts in the Jr. Member section, then the scripts that are a work in progress in the New Member section. This way, the interest of people would still be high, since they're getting banking scripts after 10 posts, but they would want to continue contributing.
Idea 2
Make something like after you have your 10 posts/1 week of registration that you have to stay above 20-40% activity to continue having access to the Jr. Member scripts. You might say "What if I want to take a break from SRL for a while?", that could be a problem, but if you would take the time to learn to script and become an SRL Member, you wouldn't have to worry about it. If not, then you'll have to suffer the consequenses
All in all, I don't think rasiing the req postcount will help much :\