Is it possible to use OpenStreetMap and Leaflet in a commercial product?

Question

OpenStreetMap

Tell me, is it possible to build your commercial product on maps from OpenStreetMap? Based on the text on the site of the maps themselves - www.openstreetmap.org/copyright , you can distribute your product only under the same license as the maps

You are free to copy, distribute, share and modify our data as long as you link to OpenStreetMap and its community. If you modify or take our data as a basis, then you must distribute the result only under the same license.

At the same time, in the license itself - opendatacommons.org/licenses/odbl/1.0 clause 3.0 it is indicated that

These rights explicitly include commercial use, and do not exclude any field of endeavor

Everything seems to be clear, but I would like to clarify whether someone used their cards in their commercial projects and whether I interpreted the license correctly.
The same question applies to Leaflet. They don't have a word in https://github.com/Leaflet/Leaflet/blob/master/LICENSE about commercial use or licensing type. Does this give me the green light to use the plugin for commercial purposes, as long as credit is given to the authors?

Answer 1

Yes, you can. There are only two essential conditions: there must be a link to OSM somewhere in the about if you are using data, or if you are showing a map based on OSM data, then the copyright must be prominently displayed on the map; Secondly, if you modify and/or combine OSM data with another data set and are going to transfer it to third parties, your result should also be available to everyone under the ODBL license.