Welcome to the forum! Some parts of Grady have quite good lease bonus rates. They should ask what the offers are for 1/5th and 1/4. The bonus may be lower, but the long term payout could be higher if multiple wells are drilled. I just looked up the current leasing patterns and quite a few leases have been filed in there at 1/4th.
If they are getting quite a few offers, then that is a good sign of pending activity. The most critical thing here is to get a good lease. A bad lease with a high bonus will lose money in the long run. They will need to get the most favorable lease clauses by adding an addendum and and strike the unfavorable clauses from the proposed lease. The first lease template they receive will most likely be in the operator favor and not in the mineral owner favor. You can probably get a good lease if several folks are trying to get a piece of the minerals. May take a couple of iterations. Read the Mineral Help tab at the top. Critical items to consider are no post production costs (not with the however… clause), limit the shut in time frame, depth clause, no warranty of title, commencement of drilling clause, no top lease clause, no option to renew clause, just to mention a few. (not giving legal advice…)