at the moment it is only possible to see your own ideas, created in the SMAX service portal. yes, you can find other people's ideas, but it is not possible for an end user to see all existing ideas at once.
if I enter a new idea it is very unlikely to get "likes" for it from other end users because they just don't know about my newly submitted idea. the only way for other users to find my idea is to accidentally search for a key word which is part of my idea title or subscription.
just to clarify: my post refers to the "idea & proposal" module within SMAX, not this Micro Focud idea exchange community here