Yes/No; Free users can browse selected introductions, answer questions to improve the matching algorithm and initiate guided communications.
Premium have unlimited custom messaging with matches, ad free experience and more introductions. Members only see intersection of what they are looking for and what other members are looking for. Free messaging and status posting for undergraduates (5 messages/day limit).
for named portal; also 3-5% of (#31) and (#191), which offer access to the same services and communication with the entire user pool through ru and love.subdomains Yes: Premium content like additional search criteria and double appearances in others' relevant searches for "VIP membership".
Single payments for regional advertising of profile (one-time appearance in scrolling banner for $1 – user picture, link, short text for mouseover; bidding war for stationary second banner cost of $1/minute).
Most services also encourage members to add photos or videos to their profile.