I know what you mean with this post and to be honest I have the same concerns. I've just begun applying LOA (again) and for sure you notice small "co-incidences" occurring. These co-incidences are always small things- like your 20 RM notes for example- never big stuff. Even LOA followers who claim huge success, are outnumbered by millions of ordinary people who've done well using other techniques (hard graft and pessimistic thinking). Such co-incidences can be explained in the material world- LOA is not required as an explanation.
Many LOA followers who call (for example) your RM20 notes synchronicities would laugh at Christians who had prayed for wealth, only to have God deliver such a puny amount to them. They'd really question anyone who supported Chrisitianity with such flimsy evidence for their faith.
I should stress I'm not challenging LOA, but as I've said before it can make PD very difficult. If LOA works, it's groundbreaking, if not- it's a major distraction to things we can really be doing to improve ourselves.
I think our business forums are a great example of this. I guess some 90% of posts are to do with SBI, LOA or books like rich dad, poor dad. I think this forum may be moving away from the idea of pure PD and more towards spirituality and faith. Another danger is that we may move away from accepting expert advice in the belief that we know what's best or that we really can create our own reality. In the interests of balance, I'd love some forums here to be "LOA free zones", it would prompt different types of thinking and advice, particuarly in the business sections.