You can ignore most of the random spammers here on the forum, it's not all doom and gloom.

If your thread isn't an overt scam, and not shady in any way, then there will be no problems having another member post it up for you. A DT member is only going to tag you or the thread poster if they knowingly post something suspicious/scammy.

Whether you choose to pay someone else to post it or upgrade to copper membership depends on your own wants. That said, nobody is going to post up your thread if it has even the slightest hint of being a scam.