Cross posting is generally frowned upon by most communities. You will be taking a risk when you do so.
It would be better for you to use tags intelligently so that you get your post featured in as many communities as possible.
For example:
Use of #diy will get your post featured in https://www.build-it.io and the opportunity to earn BUIDL tokens.
Use of #forsale or #contests or #services or #gigs or #events or #fundraising tags will get your post featured in https://hivelist.org and the opportunity to earn LIST tokens. see https://hivelist.io/list-token/
Use of #sports tag will get your post featured in https://sportstalksocial.com and the opportunity to earn SPORTS tokens.
RE: Electroculture basics: harvesting terrestrial & cosmic energy with magnets, cables & antenna pt2