After all, if we're going to clog the "Ask A Question..." thread, in the name of manners, it would be unforgivable to do so halfway.
Alternatively, we could accept that while manners are undeniably important, some of the traditional rules on saying "Thank you," and "You're welcome," which pre-date the rise of online interaction, may not strictly apply in the context of an extremely active thread on an online forum with numerous participants. (Just as etiquette and manners originally intended to address in person conversation and postal correspondence adapted in various ways to the widespread use of the telephone as a means of communication.)
Naturally, none of this precludes one from sending a private message of thanks, in response to some particularly worthwhile advice. Nor does it suggest that appropriate public follow-up, regarding how advice received influenced how one opted to proceed, is necessarily undesirable.