I do well from articles, and promoting stuff before it becomes fashionable.

Actually understanding products to be able to pre-sell, either to customers or JV partners I feel is important.

I am currently only handling 3rd party products, thus 2-tier for me is vital. It is annoying me how Paypal seem to be killing 2-tier off.

How does a massive program such as Sitesell still manage to offer 2 tier and payments by Paypal?

I fully respect the work Mike Filsaime has been doing on this, and the reasons Paydotcom stopped offering 2 tier, it just seems strange that Paypal hasn't made this clearer, and enforced it universally.