For all of us, there's really no way around getting comments requires giving them in kind. I participate in February Album Writing Month ( www.fawm.org ) and there are thousands of active participants each February. There's a few folks on there that get multiple tens of comments on each of their songs and they fall into two categories:
1. the person is just a comment-a-holic and their comments are encouraging and insightful
2. there are a few folks on there that have a certain amount of fame in that community that are prolific and excellent songwriters and each year the community looks forward to their output. One of the guys is actually a darling of the Taxi.com website and has pretty regular sync licensing placements.

Then there are the rest of us that generally get as many comments as we give out. My ratio typically goes like this; for each comment I give, I get 0.75 comment back. But I will spend waiting times at oil changes, dr. waiting rooms, sports practice time for kids, etc. listening through loads of songs at once and picking out something that made me smile or caught my attention and highlight that in a simple comment like "I really enjoyed the cadence of the wordplay in the 2nd line of the chorus" and call it out specifically. If it's someone that I know I've traded comments with over the years, then he/she is usually up for constructive criticism and it seems to be appreciated. That's part of the point of that community once you get settled in to it. Very few uncalled for unnecessarily negative comments - those posters are usually shamed from the community. In 2015 or 2014, there was one particular commenter that was outed for their single line comment: "Sh*t's weak, bro" and it became a sort of meme for the community as what not to do.

I would encourage all of you PGers that are into songwriting of any type to join the FAWM challenge next February. PG products are grossly under-represented there and it's such a ripe market because the challenge is to write 14 songs in the month of February each year. 14.5 (collaborate with someone for the 0.5) in leap years.

-Scott